11th Standard CBSE Biology Question papers - study material, free online tests, previous year question papers, answer keys, topper answers, centum question paper, exam tips

Class 11th Biology - Chemical Coordination and Integration Case Study Questions and Answers 2022 - 2023 - by Study Materials - Sep 09, 2022 - View & Read

1)
The picture given below depicts the location of endocrine glands in a human body. Answer the questions that follow:

Identify and name the gland described in each of the following.
(a) The gland that secretes emergency hormones.
(b) The gland concerned with the normal rhythms of sleep-wake cycle.
(c) The gland that plays a major role in the development of immune system.
(d) The gland which secretes gonadotropins.
(e) The gland that regulates glucose homeostasis.
(f) The gland that secretes androgens.
2)
The picture given below is the diagrammatic representation of pituitary and its relationship with the hypothalamus.

Answer the following questions.
(a) What doesArepresent? Name the two hormones secreted by A.
(b) What is the significance of B?
(c) Identify D.
3)
A milkman is very upset one morning as his cow refuses to give milk, The milkman's wife gets the calf from the shed. On fondling by the calf, the cow gave sufficient milk Describe the role of endocrine gland and pathway associated with the response.
4)
On an education trip to Uttranchal, Ketki and her friends observed that many local people were having a swelling in their neck. Please help Ketki and her friends to find out the solutions to the following questions.
(a) Which probable disease are these local people suffering from?
(b) What is the cause of the disease?
(c) Whatis the effect of this condition on pregnancy?
(d) What is exopthalmic goitre?
5)
A sample of urine was diagnosed to contain high amount of glucose and ketone bodies. Based on this observation, answer the following questions.
(a) Name the endocrine gland and the hormone, related to this disorder.
(b) Name the cells targetted by this hormone.
(c) What term is given to this condition?
(d) How can it be treated?

Class 11th Biology - Neural Control and Coordination Case Study Questions and Answers 2022 - 2023 - by Study Materials - Sep 09, 2022 - View & Read

1)
The major parts of the human neural system are depicted below.
Fill in the empty boxes (A to F) with the appropriate words.
2)
The following flow chart gives the steps in the generation and conduction of a nerve impulse along a nerve fibre. Fill in the blanks A, B, C, D, E and F. At resting/polarised state of the neuron, the electrical potential difference is called ______ (A).
  \(\downarrow\)
When the neuron is stimulated at a point, there is a rapid influx of _____(B) and the outer side becomes ______(C) charged.
  \(\downarrow\)
The membrane is ______(D) and the potential difference across the membrane, is called _______(E).
  \(\downarrow\)
The permeability of the membrane to B is very short-lived and the membrane potential A is restored, i.e. membrane is _______(F).
3)
The following flow chart depicts the events in synaptic transmission. Fill in the blanks (A), (B), (C), (D), (E) and (F).
4)

A diagrammatic representation of the reflex action (knee-jerk reflex) is shown above. The components of a reflex arc are labelled.
Identify the labels A to F shown on the diagram.
5)

The diagram showing parts of an eye is given above.
Identify and name the part as asked below.
(a) The anterior part of sclera.
(b) The thinned-out portion of the retina that contains only cones.
(c) The thickened anterior part of choroid.
(d) The space between the lens and retina.
(e) The pigmented and opaque structure that forms the coloured portion of the eye.
(f) The point slightly above the posterior pole through which optic nerve leaves the eyeball.

Class 11th Biology - Locomotion and Movement Case Study Questions and Answers 2022 - 2023 - by Study Materials - Sep 09, 2022 - View & Read

1)

A diagrammatic sketch of an actin filament is shown aboye. Answer the following questions.
(a) Name the parts labelled A, B and C.
(b) What is the significance of A during resting stage?
(c) Name the monomers of C.
2)

A diagrammatic sketch of a myosin filament is given above. Answer the following questions.
(a) Identify the following in the diagram of myosin filament.
(i) ATP-binding sites
(ii) Actin-binding sites
(b) Name the monomers of myosin.
(c) Expand
(i) HMM and
(ii) LMM.
3)
Radha was running on a treadmill at a great speed for 15 minutes continuously. She stopped the treadmill abruptly and came out. For the next few minutes, she was breathing heavily/fast. Answer the following questions.
(a) What happened to her muscles, when she strenuously exercised?
(b) Why did her breathing rate change?
4)

A diagram of human rib cage is given above, Observe the diagram and answer the following questions.
(a) What are true ribs? How many are true ribs in the rib cage?
(b) What are vertebrochondral ribs?
(c) Why are the ribs described as bicephalic?
5)
The diagram of a pectoral girdle of a human is shown below. Observe the diagram. fill in the blanks in the description ofthe structure of a pectoral girdle of humans.

Each pectoral girdle is formed of two bones, ______(A) and ________(B) shown in the diagram. The bone B has an elevated ridge, called __________(C), which projects as a flat expanded process, called _________(D), where the A articulates. Below D is a depression called ________(E), where the ________(F) articulates.

Class 11th Biology - Excretory Products and Their Elimination Case Study Questions and Answers 2022 - 2023 - by Study Materials - Sep 09, 2022 - View & Read

1)
Animals accumulate nitrogenous wastes, carbon dioxide, water and some inorganic ions as metabolic wastes, which have to be eliminated totally or partially.
(a) Name the most toxic and the least toxic nitrogenous wastes.
(b) Kidneys do not play any significant role in the elimination of Ammonia. How is ammonia eliminated by animals?
(c) What term is given to the animals which excrete urea as their major nitrogenous waste?
(d) How is carbon dioxide eliminated by human beings?
2)
A survey of the animal kingdom shows that different groups of animals have different types of excretory structures. They depend on their habitats and the nature of the excretory products.
(a) Human kidneys perform not only excretion of nitrogenous wastes, but also another function. Name that function.
(b) Name the excretory structures of
(i) Amphioxus
(ii) Crustaceans (iii) Insects
(iv) Platyhelminths
(v) Annelids.
3)
Nephrons are the structural and functional of human kidneys; they are the complex tubular structures.
(a) What are the two major parts of a nephron?
(b) What is renal corpuscle?
(c) Name the two types of nephrons in human kidneys.
4)

A diagram of a Malpighian body (also called Renal corpuscle) is given above. Answer the following questions
(a) Name the parts labelled as A, B, C and D.
(b) What does the Malpighian body continue as?
(c) What are peritubular capillaries?
5)
The kidneys have built-in mechanisms for the regulation of glomerular filtration rate. One such mechanism carried out by the juxta glomerular apparatus is shown in the following flow chart. Fill in the blanks A, B. C, D, E and F in the flow chart.
The (A) cells release Renin when there is a fall in (B)
\(\downarrow\)
Renin converts (C) in the in blood into (D)
\(\downarrow\)
D activates the adrenal cortex to release (E)
\(\downarrow\)
E raises the reabsorption of Na⁺ and water and raises the (F)

Class 11th Biology - Body Fluids and Circulation Case Study Questions and Answers 2022 - 2023 - by Study Materials - Sep 09, 2022 - View & Read

1)

The aboye diagram shows the different types of leucocytes.
Identify and name the cells as asked in the following questions.
(a) Name the two types of leucocytes that are phagocytic.
(b) Which among them is the
(i) most abundant
(ii) least in number?
(c) Which among them is involved in
(i) allergic r:eactions
(ii) inflammatory reactions?
2)
You know that there are four blood groups, A, B AB, and O, among human beings. Now, answer the following questions based on that.
(a) What forms the basis for this classification?
(b) Before any transfusion of blood, why should the blood of the donor be matched carefully with that of the recipient?
(c) Why are persons with blood group AB called (universal recipient'?
(d) Name the blood group(s), which
(i) persons with blood group 'O'can receive
(ii) can be donated only to persons with blood group'AB'.
3)
Amit and Mrinal are good friends. Amit,s father had an injury and needed blood transfusion; he is of blood group B. Mrinal is of blood group A and he had arranged for blood donors.
(a) Name the blood groups that will be suitable for transfusion to Amit's father.
(b) Name the antigen and the antibody present in Mrinal's blood.
(c) Why are persons with blood group O known as 'universal donors'?
4)
There are two types of blood groupings - the ABO and Rh groups, which are widely used all over the world.
Answer the following questions regarding Regrouping.
(a) What forms the basis for classifying human individuals as Rh-positive and Rh-negative?
(b) If a foetus is suffering from a condition, called erythroblastosis fetal, identify the Rh group of the
(i) mother
(ii) father
(iii) foetus.
(c) How can this condition be avoided?
5)
If you injure your finger while cutting vegetables, the blood stops oozing out of the wound in a short time. Blood exhibits coagulation or clotting, a mechanism to prevent excess loss of blood from the body. A clot or coagulum is formed at the site of injury. The following flow chart shows the steps in the mechanism of coagulation. Fill in the blanks A to F.
When blood comes out of the blood vessels from an injury, the platelets release certain factors.
\(\downarrow\)
These factors stimulate the reactions in the plasma fo form enzyme (A)
\(\downarrow\)
The above enzyme converts (B) in the plasma into (C)
\(\downarrow\)
C converts the inactive (D) into a network of threads, called (E)
\(\downarrow\)
A coagulum or clot is formed when the dead and damaged (F) are trapped in E.

Class 11th Biology - Breathing and Exchange of Gases Case Study Questions and Answers 2022 - 2023 - by Study Materials - Sep 09, 2022 - View & Read

1)

A diagrammatic view of human respiratory system (with a sectional view of the left lung) is shown above. Answer the following questions
(a) Identify any four parts belonging to the conducting part of the respiratory system.
(b) Mention any two functions of the conducting parts of the system other than the transport of air to alveoli.
2)
The lungs are situated in the thoracic chamber, which is anatomically an air-tight chamber. Answer the following questions regarding this.
(a) Mention the boundaries of the thoracic chamber that make it an air-tight chamber.
(b) What is its significance?
(c) Why is it essential for breathing?
3)
The two stages in the breathing process are shown below. Observe the diagram and answer the question that follow:

(a) Identify the two stages (A and B) of breathing.
(b) Mention the condition and the position of diaphragm in A and B, respectively.
(c) Compare the intra-pulmonary air pressure in the stages A and B.
4)
A diagrammatic representation of the transport of oxygen and carbon dioxide in the blood and their exchange at alveolus and the body tissues, is shown below.

Give the values of P_O2 and P_CP2 at A, Band C shown in the diagram.
5)
A diagram of a section of an alveolus with a pulmonary capillary is given below. Answer the questions that follow:

Exchange between Alveolus and Capillaries
(a) Identify the three major layers that form the diffusion membrane. What is the total thickness of the membrane?
(b) Mention the two factors that affect the rate of diffusion of gases

Class 11th Biology - Digestion and Absorption Case Study Questions and Answers 2022 - 2023 - by Study Materials - Sep 09, 2022 - View & Read

1)
The anterior. opening of our alimentary canal, the mouth, leads into the oral or buccal cavity. It contains a muscular tongue and a number of teeth of various types. Answer the following questions.
(a) How is the tongue attached to the floor of the buccal cavity?
(b) Where are taste buds present in the tongue?
(c) What do the terms
(i) diphyodont,
(ii) heterodont and
(iii) thecodont signify with reference to human dentition?
(d) Same the substance that makes up the hard chewing surface of the teeth, is made of.
2)

(a) Identify the four types of teeth, (A, B, C, D) that are present in an adult human.
(b) Write the dental formula of an adult human.
3)

The different regions in the human stomach are shown in the figure given above.
(a) Where is stomach located in our body?
(b) Identify the parts B, C and D in the diagram.
(c) Name the sphincters that regulate the
(i) entry and
(ii) exit of food into and out of the stomach, respectively.
4)
Given below is the diagrammatic representation of the transverse section of human gut, showing the four basic layers (of different cell types and tissues) of its wall. Observe the diagram and answer the questions that follow:

(a) Identify and name the layer
(i) that is made of mesothelium with some connective tissue.
(ii) that forms infoldings into the lumen of alimentary canal.
(b) Identify G. Why do they have a brush-border appearance?
(c) Identify E and name the glands present in it in the duodenal region.
5)

The above diagram shows the duct systems of liver, gall bladder and pancreas. Answer the following questions.
(a) Identify the ducts only, from among the parts labelled A to G.
(b) Where is sphincter of Oddi present?

Class 11th Biology - Plant Growth and Development Case Study Questions and Answers 2022 - 2023 - by Study Materials - Sep 09, 2022 - View & Read

1)
The diagram given below is a diagrammatic representation of the locations of meristems in the shoot and root of a plant.
Answer the questions that follow.
(a) Identify the letters A, B and C marked in the figure.
(b) What do the arrows indicate?
(c) Which among them is/are involved in
(i) primary growth
(ii) secondary growth?
2)
The diagram shows the detection of zones of elongation in the primary root. Answer the questions that follow:

(a) Name the technique used to detect the zones of elongation in the root tip.
(b) Name the zones that have elongated the most.
(c) Mention the three characteristics of the cells in the zones of elongation.
3)
An organism or a part of the organism can produce cells during growth in a variety of ways. The following figure is a diagrammatic representation of two types of growth, A and B.

Identify the types of growth A and B. Differentiate between them with an example of each.
4)

The above diagram shows. a linear growth curve. Answer the following questions based on it.
(a) What type of growth is exhibited in the above graph?
(b) Give an example where such a curve can be obtained.
(c) How can it be mathematically expressed?
5)

A sigmoid growth curve is shown above. Answer the following questions based on it.
(a) Name the phases of growth A, Band C in the graph.
(b) What type of growth occurs in phase B?
(c) How can it be mathematically expressed?

Class 11th Biology - Respiration in Plants Case Study Questions and Answers 2022 - 2023 - by Study Materials - Sep 09, 2022 - View & Read

1)
A process is occurring throughout the day in an organism 'X'. Cells of the body do participate in the process. During the process, ATP, CO2 and water are formed. It is not a light-dependent process.
(a) Name the process.
(b) Is it a catabolic process or an anabolic process?
(c) What could be the raw material for this process?
2)
A simplified form of glycolysis is shown in the flow chart given below, where pyruvic acid is the end product.

Write the three metabolic fates, A, Band C of the pyruvic acid and mention against each aerobic or anaerobic condition.
3)
The flow chart given below represents the major pathways of anaerobic respiration. Answer the questions that follow:

(a) Identify A, B, C and D.
(b) Name the two enzymes involved in the conversion of pyruvic acid to C.
4)
Study the equation given below and answer the questions that follow:
\(\begin{aligned} \text { Pyruvic acid }+\mathbf{C o A}+\mathbf{N A D}^{+} \frac{\mathbf{M g}^{2+}}{(\mathrm{A})} \ { Acetyl } \mathbf{C o A}+\mathbf{C O}_{2}+\mathbf{N A D H}+\mathbf{H}^{+} \end{aligned}\)
(a) Name the type of reaction, the pyruvic acid undergoes.
(b) Where does this process take place?
(c) Name the enzyme \(\text { (A) }\) involved in the reaction.
(d) What is the fate of acetyl CoA formed?
5)
The summary equation for a particular phase of respiration is given below. Study the equation and answer the questions that follow.
\(\begin{aligned} \ { Pyruvic \ \ acid }+4 \mathrm{NAD}^{+}+\mathrm{FAD}+2 \mathrm{H}_{2} \mathrm{O}+\mathrm{ADP}+\mathrm{P}_{i} \longrightarrow 3 \mathrm{CO}_{2}+4 \mathrm{NADH}+4 \mathrm{H}^{+}+\mathrm{FADH}_{2}+\mathrm{ATP} \end{aligned} \)(a) What does the equation represent?
(b) Where does this process take place?
(c) How many ATPs can be formed from 4NADH and one FADH₂ shown 'in the equation?

Class 11th Biology - Photosynthesis in Higher Plants Case Study Questions and Answers 2022 - 2023 - by Study Materials - Sep 09, 2022 - View & Read

1)

Observe the experimental setup and answer the following questions.
(a) Name the scientist who conducted this experiment.
(b) What did he conclude from this experiment?
(c) Name the scientist who showed that
(i) light is necessary for photosynthesis.
(ii) glucose is made in those parts of a plant that are green.
2)
Study the figure given below and answer the questions that follow:

(a) Name the cells where it is present abundantly.
(b) Name the process of photosynthesis that occurs in the parts labelled 1 and 2.
(c) Name the products formed at 2, that are used in the process at 1.
(d) Name the first stable product formed in the process at 1.
3)
If you look at plants, there are so many shades of green in their leaves, even on the same plant. When you separate the leaf pigments through paper chromatography, you find that the colour of the leaves is not due to a single pigment, but due to four different pigments.
(a) What is a pigment?
(b) Name the four different pigments found in leaves.
(c) Can you guess, which is the most abundant leaf pigment in the world?
4)
In the following figure, the curve A represents the rate of photosynthesis while the curve B represents the absorption spectrum of chlorophyll-a. Observe the graph and answer the questions that follow:

(a) What is absorption spectrum?
(b) Where in the visible spectrum of light, is there maximum photosynthesis?
(c) How is the rate of photosynthesis measured for plotting action spectrum?
5)

A diagrammatic representation of a Light Harvesting Complex (LHC) is shown in the figure given above. Answer the following questions.
(a) How do the antennae pigments help to make photosynthesis more efficient?
(b) Name the pigment that forms the reaction centre.
(c) Name the reaction centre of photosystem I and photosystem II.

Class 11th Biology - Mineral Nutrition Case Study Questions and Answers 2022 - 2023 - by Study Materials - Sep 09, 2022 - View & Read

1)

Observe the diagram given above and answer the following questions.
(a) Name the technique shown in the figure.
(b) Name any two plants for which this technique can be emplhyed for their commercial production.
(c) Mention the purpose for which
(i) the feeding funnel and
(ii) the aeration tube are used in this experimental set-up.
2)

The picture given above shows hydroponic plant production, where plants are grown in a tube that is kept on a slight incline.
(a) What is the role of the pump in this experiment?
(b) What do the arrows indicate?
(c) Name the scientist who first showed that plants could be grown to maturity in defined nutrient solution.
3)
Plants absorb a number of elements from the soil; about sixty elements are found in different plants. But, studies with reference to mineral nutrition and metabolism have shown that all the elements absorbed are not essential for the plants. Scientists like Arnon, have listed the essential elements based on certain criteria.
Write the three criteria of essentiality of elements in plant nutrition.
4)
The micronutrients are always required in minute or trace quantities; their moderate decrease in quantity causes deficiency symptoms to appear while their moderate increase in quantity causes toxicity.
(a) What is meant by toxicity of an element?
(b) How does manganese toxicity cause deficiency symptoms of
(i) iron and
(ii) magnesium?
5)
Given below is the flow chart of the nitrogen cycle showing the relationship among the three main nitrogen pools, i.e. atmospheric, biomass and soil. Study the diagram and answer the questions that follow:

(a) Fill in the blanks, A, B, C and D.
(b) Name two bacteria that carry out the step A.

Class 11th Biology - Transport in Plants Case Study Questions and Answers 2022 - 2023 - by Study Materials - Sep 09, 2022 - View & Read

1)
Transport in plants over long-distance proceeds through the vascular tissues in a process, called translocation. Transport in xylem (of water and minerals) is unidirectional.
(a) How do substances move over short distances?
(b) Organic and mineral nutrients undergo multidirectional transport. Justify (Give four points).
2)

Observe the figure given above and answer the following questions.
(a) Identify the process I, II and III.
(b) Why does the transport rate reach a maximum in facilitated diffusion?
(c) What term is given to the membrane proteins involved in active transport?
3)
Certain proteins in the membrane are responsible for facilitated diffusion and active transport; hence, they show some common characteristics. They also differ from each other in certain aspects.
(a) Describe two such similar features of the proteins involved in facilitated diffusion and active transport.
(b) Mention one feature other than the requirement of energy, in which the proteins of active transport differ from that of facilitated diffusion.
4)
Study the figure given below, in which two chambers A and B containing solutions of different concentrations are separated by a selectively permeable membrane.

(a) Solution of which chamber has a lower water potential?
(b) Solution of which chamber has a lower solute potential?
(c) In which direction will osmosis occur?
(d) At equilibrium which chamber will have lower water potential?
(e) If one chamber has a \(\Psi\) of - 2000 kPa, and the other - 1000 kPa, which is the chamber that has the higher \(\Psi\)?
(f) What will be the direction of the movement of water when two solutions with \(\Psi_{\mathbf{w}}\) =-0.2 MPa and \(\Psi_{\mathbf{w}}\) = 0.1 MPa are separated by a selectively permeable membrane?
5)
In an experimental set up on osmosis, a 'stronger' solution of glucose is taken in a thistle funnel with its mouth tied with a semipermeable membrane. It is kept in a beaker containing a 'weaker' solution of glucose.
(a) What is meant by 'stronger' and 'weaker' solutions?
(b) Which of them has a higher water potential?
(c) Which of them has a lower solute potential?
(d) If a pressure is applied from the upper part of the funnel, the diffusion of water into it stops.
(i) What is this pressure known as?
(ii) Which of the solutions (mentioned above) will have a higher pressure?

Class 11th Biology - Cell Cycle and Cell Division Case Study Questions and Answers 2022 - 2023 - by Study Materials - Sep 09, 2022 - View & Read

1)

A diagrammatic representation of the cell cycle indicating the formation of two daughter cells from a parent cell is giVen above. Observe the diagram and answer the following questions.
(a) When does replication of DNA take place?
(b) The amount of DNA in G₁ phase is denoted as 2C and the chromosome number as 2n. Show
(i) the amount of DNA and
(ii) the chromosome number in prophase.
(c) Why is mitosis called equational division?
2)

(a) Label the parts A, B, C and D in the diagram given above.
(b) Determine the stage and the event that is represented.
3)

(a) Identify the stage and type of cell division.
(b) Write the two key features of this phase.
(c) Is it a plant cell or animal cell showing the process? Justify your answer.
4)
Mitosis accomplishes not only the segregation of the duplicated chromosomes to daughter nuclei, but the cell itself divides into two daughter cells, by cytokinesis. In animal cells, cytokinesis occurs with the appearance of a furrow in the cell membrane that deepens and joins in the centre to divide the cell, but in plants it is different.
(a) Why cannot the plant cells divide the same way as animalcells?
(b) Name the precursor of cell walls in plant cells. What does it represent in the cell wall?
(c) What will be the consequence, if cytokinesis does not follow karyokinesis? Give an example.
5)
Sexual reproduction involves fusion of two gametes, each with a complete haploid set of chromosomes. In animals, gametes are formed from specialised diploid cells. Meiosis ensures the production of haploid phase in the life cycle of sexually reproducing organisms and fertilisation restores the diploid phase.
(a) Mention the four key features of meiosis.
(b) Why does reduction in the number of chromosomes occur during meiosis?

Class 11th Biology - Biomolecules Case Study Questions and Answers 2022 - 2023 - by Study Materials - Sep 09, 2022 - View & Read

1)
The steps in the chemical analysis of a living tissue sample are shown below. Fill in the blanks A, B, C, D, E and. F.
2)
All the chemical elements found in a sample of earth's crust are also present in a sample of living tissue. But a critical chemical analysis shows that the relative abundance of carbon and hydrogen with respect to other elements is higher in the living organisms.
(a) Name the most abundant chemical compound in living organisms.
(b) What term is given to the carbon compounds in living cells?
(c) Name any two functional groups of such compounds.
(d) Name any two elements present in the 'ash' of plants.
3)

The molecular structures of three amino acids are given above.
(a) Identify the amino acids A, Band C
(b) Mention their respective variable group (designated as R-group).
4)

Study the changes in the structure of an amino acid shown above and answer the following questions.
(a) Mention the specific property of amino acids shown in the above structures. What is its consequence?
(b) What term is given to the form of amino acid in B?
5)

Study the molecular structure of the biomolecule given and answer the following questions.
(a) Identify the molecule shown.
(b) what do R1, R_2, and R₃ in the molecule represent?
(c) Name the alcohol involved in it. Give its another name.

Class 11th Biology - Cell: The Unit of Life Case Study Questions and Answers 2022 - 2023 - by Study Materials - Sep 09, 2022 - View & Read

1)
All organisms are composed of cell(s), i.e. organisms are unicellular or multicellular. The discovery of microscope and its improvement leading to the electron microscope has revealed all the structural details of cells.
(a) Why are cells considered the fundamental structural and functional units of life?
(b) Mention two characteristic features of unicellular organisms.
(c) Name the scientist who
(i) first observed and described living cells.
(ii) showed that cell wall is a unique character of plant cells.
2)

The diagram given above shows the diagrammatic representation of a typical eukaryotic cell.
(a) Identify the following parts
(i) Mitochondria
(ii) Endoplasmic reticulum
(iii) Golgi bodies
(iv) Nucleolus
(b) Name the following:
(i) The longest cells in a human body.
(ii) The organisms with the smallest cells
3)
The prokaryotic cells have certain specialised, differentiated infoldings of the cell membrane. They serve certain specific functions.
(a) What term is given to these infoldings?
(b) Name the three different forms of such infoldings.
(c) Mention two of their functions during cell division.
4)
Detailed electron microscopic and other chemical investigations have shown that the cell membrane is composed of lipids, proteins and some carbohydrates.
(a) What per cent of the membrane of human erythrocytes consists of lipids?
(b) Name the major lipid component of membranes.
(c) How are the lipids arranged in the membranes?
(d) What are the two types of membrane proteins based on the ease with which they are extracted?
5)
The improved model of the structure of cell membrane proposed by Singer and Nicolson (1972), is called fluid mosaic model. The fluid nature of the membrane is important from the point of view of certain functions.
(a) What is meant by fluidity of membrane?
(b) Mention any four functions for which the fluid nature of the membrane is necessary.

Class 11th Biology - Structural Organisation in Animals Case Study Questions and Answers 2022 - 2023 - by Study Materials - Sep 09, 2022 - View & Read

1)
In nearly all animal tissues, specialised junctions provide both structural and functional links between the individual cells of the tissue. Three types of cell junctions are found in the epithelium and other tissues.
Name the three types of cell junctions and mention one function of each of them.
2)

Unicellular and multicellular glands are shown in the figure given above. Answer the following questions.
(a) Name the types of epithelial cells that become specialised for secretion.
(b) Give an example each, of unicellular and multicellular glands in our body.
(c) Name the types of glands based on the mode of pouring their secretion
3)
Connective tissues are the most abundant and widely distributed tissues in the body of complex animals. They range from loose connective tissues to specialized types.
(a) Why are connective tissues named so?
(b) Name two types of loose connective tissues.
(c) Why is blood called a fluid connective tissue?
4)

The diagrammatic representation of a type of loose connective tissue is given above. Answer the following questions based on that.
(a) Identify the type of connective tissue.
(b) Identify and name the three types of cells present in it.
(c) Mention two functions of the cells
5)

Three types of muscle tissue are shown in the picture given above.
(a) Identify the type of muscle tissue A, Band C.
(b) Mention one location or site in a human body, where each of them is present.

Class 11th Biology - Anatomy of Flowering Plants Case Study Questions and Answers 2022 - 2023 - by Study Materials - Sep 09, 2022 - View & Read

1)
The meristems which occur at the tips of roots and shoots, are called apical meristems. They produce primary tissues of the plant body. The shoot apical meristem occupies the distal most region of the stem axis.
(a) How is it protected?
(b) How are axillary buds formed?
(c) What is intercalary meristem?
2)
Tissues vary depending on their location in the plant body. Their structure and functions also depend on their location in the plant body. On the basis of their structure and location, there are three types of tissue systems.
Name the three types of tissue systems in a plant body. Give one example for each.
3)
The diagrammatic representation of stomatal apparatus of a dicot plant is shown below. Answer the questions that follow:

(a) Identify the parts labelled A, B, C and D
(b) How does C differ from B?
4)
Xylem is the conducting tissue of water and minerals from the roots to the stem and leaves. Tracheids and vessels are the major conducting elements of xylem, whose diagrams are given below.

(a) Identify the vessel and the tracheid in the figure.
(b) Write two differences between tracheids and vessels.
5)

Identify the three types of vascular bundles, A, B and C shown above. Give one example for each type.

Class 11th Biology - Morphology of Flowering Plants Case Study Questions and Answers 2022 - 2023 - by Study Materials - Sep 09, 2022 - View & Read

1)
The figure given below represents the different regions of a root tip.

(a) Identify the regions A, B, C and D in the root tip.
(b) Write any two characteristics of the cells present in the region C
2)
Roots in some plants change their shape and structure and become modified to perform functions other than anchorage and absorption and conduction of water and minerals. They are modified for storage, respiration, additional support, etc.
(a) Name two types of roots that provide additional support to plants and give an example for each.
(b) Name the type of root that helps to get atmospheric oxygen for respiration. Give an example.
3)
Stem is the above-ground part of a plant and is characterised by the presence of nodes and internodes and axillary and terminal buds. But, in some plants, the stem is modified to perform certain special functions. How is the stem modified in each of the following and mention their functions?
(a) Citrus
(b) Opuntia
(c) Coloeasia
4)

(a) Identify the two types of venation A and B.
(b) What is meant by venation?
(c) Mention two functions the veins perform.
5)
Two types of compound leaves are shown below.

(a) Identify the types of compound leaves, A and B.
(b) Give an example of each.
(c) How do they differ from each other?

Class 11th Biology - Animal Kingdom Case Study Questions and Answers 2022 - 2023 - by Study Materials - Sep 09, 2022 - View & Read

1)
Animals are classified on the basis of their symmetry into three categories.
(i) Asymmetrical,
(ii) Radially symmetrical and
(iii) Bilaterally symmetrical.
They are also classified into diploblastic and triploblastic.
(a) Name one phylum and an animal as example for each of the following, where animals are
(i) diploblastic and radially symmetrical.
(ii) triploblastic and radially symmetrical.
(b) Name two phyla, where animals are exclusively marine.
2)
Animals of the phyla like Annelida, Arthropoda, Mollusca, Chordata, etc. have organ system level of organisation. Organ systems in different groups/phyla of animals exhibit various patterns of complexities.
Name and describe the two types of circulatory system among animals and name one phylum as example for each.
3)
The diagram given above shows the arrangement of germinal layers.
(i) Identify the parts labelled A, B, C and D.
(ii) What technical term is given to animals with pattern (a) and (b), respectively?
4)

(a) Identify the structure given above and name the phylum, it is characteristically present in.
(b) Where is it generally present in the body of the animals?
(c) Name the cell it contains.
(d) Mention two of its functions.
5)
Two animals of Phylum Annelida are shown in the picture given below. Observe them and answer the questions that follow:

(a) Identify and write the scientific names of the animals A and B.
(b) Write two major differences between them.

Class 11th Biology - Plant Kingdom Case Study Questions and Answers 2022 - 2023 - by Study Materials - Sep 09, 2022 - View & Read

1)
Algae are simple thalloid, chlorophyll-bearing, aquatic (both marine and freshwater) organisms. The form and size of algae is highly variable. They are categorised into three classes.
(a) Name the three classes of algae.
(b) Mention the two major characteristics that form the basis for this classification.
(c) Name one unicellular alga.
2)

Two members of a class of algae are shown above.
(a) Identify the two algae A and B and name the class, which they both belong to.
(b) Name the pigment which gives them the characteristic colour.
(c) Mention the characteristics of their gametes with reference to
(i) shape and
(ii) flagellation.
3)
Bryophytes are the first land plants, which occur in damp, cool and shady places. They are known as amphibians of plant kingdom, as they need water for fertilisation. In general, Bryophytes are of little economic importance; but, they are of great ecological importance.
(a) Write two ecological significance of mosses.
(b) Name the moss used for trans-shipment of living material. Justify your answer.
4)

(a) Identify the plant given above and name the division, it belongs to.
(b) Label the parts A, B, C and D marked on it.
5)
Gymnosperms and Angiosperms are seed-bearing plants. Yet, they are put under two different divisions of the kingdom Plantae.
Write three major differences between the two divisions regarding the reproductive structures and the process of reproduction.

Class 11th Biology - Biological Classification Case Study Questions and Answers 2022 - 2023 - by Study Materials - Sep 09, 2022 - View & Read

1)
Since the dawn of civilisation, there have been many attempts to classify the living organisms. The classification was done instinctively based on the use of the organisms for human benefits and not on any scientific criteria.
(a) Who was the first to classify organisms on a scientific basis?
(b) How did he classify plants?
(c) How did he classify animals?
2)
Linnaeus classified aU organisms into two kingdoms Plantae and Animalia; this system was used till recently. But now it has been found that the two kingdom system of classification is inadequate.
(a) Give four reasons to justify that the two-kingdom system of classification is inadequate.
(b) Who proposed the five-kingdom classification?
3)

(a) Name the four groups of bacteria (A-D) shown in the figure given above.
(b) Name one disease caused by bacteria (i) in plants and (ii) in human beings, respectively.
4)
Though the bacterial cell structure is very simple, they are very complex in their behaviour. Bacteria as a group show the most extensive metabolic diversity.
(a) Mention the different modes of nutrition shown by bacteria.
(b) How do Archaebacteria differ from other eubacteria?
5)

The diagram of a Nostoc filament is shown above. Answer the following questions.
(a) Identify the cell labelled 'A'. What is its significance?
(b) Name the pigment that gives them the characteristic blue-green colour.
(c) What type of nutrition is exhibited by them?
(d) Why does the ground become slippery during rainy season?

Class 11th Biology - The Living World Case Study Questions and Answers 2022 - 2023 - by Study Materials - Sep 09, 2022 - View & Read

1)
When we try to define 'living', we conventionally look for certain distinctive characteristics exhibited by living organisms. Some of them are 'defining' properties while some others are not 'defining' properties.
(a) Give four 'defining' properties of living organisms.
(b) Why is reproduction not considered an all inclusive defining characteristic of living organisms?
2)
All living phenomena are due to the underlying interactions, which result in emergent properties at higher levels of organisation. It is true in the hierarchy of organisational complexity at all levels.
(a) Give two examples to substantiate the above statement.
(b) Define living organisms based on this property
3)
There are millions of plants and animals in the world and they are known by their local names in their area. The local names do vary from place to place, even within a country. Hence, scientists have established procedures to assign a scientific name to each organism, which is acceptable to biologists all over the world.
(a) Name the system of naming organisms given by Linnaeus.
(b) Mention the two components in each scientific name.
(c) Give the scientific name of:
(i) human beings
(ii) wheat.
4)
Taxonomic studies of various species of plants, animals and other groups of organisms are useful in forestry, agriculture, industry and in general in knowing our bioresources and their diversity. Biologists have established certain procedures and techniques to store and preserve the information as well as the specimens.
(a) Mention two such taxonomic aids each, where
(i) live specimens are available.
(ii) preserved specimens are kept.
(b) What does a couplet in the taxonomic keys represent?
5)
Classification is not a single-step process, but involves a hierarchy of steps, in which each step represents a rank or category. Each category, a unit of classification, represents a taxon. Taxonomical studies of all the known organisms have led to the development of certain common categories.
(a) Name and arrange the common categories in proper sequence in a hierarchy, from the lowest to the highest category
(b) Name the following:
(i) The family that includes lion, tiger and leopard, all belonging to the genus Panthera.
(ii) The order that includes the plant families Convolvulaceae and Solanaceae.

CBSE 11th Standard Biology Subject Mineral Nutrition Ncert Exemplar 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal - May 27, 2021 - View & Read

1)
Name the macronutrient which is component of all organic compounds, but is not obtained from soil.
2)
Name the plant that accumulates silicon.
3)
Yellowish edges appear in leaves deficient in.
4)
Name an insectivorous angiosperm
5)
Organisms like Pseudomonas and Thiobacillus are of great significance in nitrogen cycle. How?

CBSE 11th Standard Biology Subject Mineral Nutrition Ncert Exemplar 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal - May 27, 2021 - View & Read

1)
A farmer adds Azotobacter culture to soil before sowing maize. Which mineral element is being replenished?
2)
Name the macronutrient which is component of all organic compounds, but is not obtained from soil.
3)
Name the plant that accumulates silicon.
4)
Yellowish edges appear in leaves deficient in.
5)
Name an insectivorous angiosperm

11th Standard CBSE Biology Public Exam Model Question 2020 - by Jyoti Hirani - Ghorakhal - Mar 03, 2020 - View & Read

1)
What is the full form of ICBN?
2)
Which of the following organisms is a good indicator of pollution in an environment?
3)
Which of the following shows no segregation of plant parts?
4)
Which of the following is an incorrect statement?
5)
What happens when stomata opens?

11th Standard CBSE Biology Public Exam Sample Question 2020 - by Jyoti Hirani - Ghorakhal - Mar 03, 2020 - View & Read

1)
Which of the following scientists started the practice of using biological names?
2)
Which is the most acceptable system of biological classification?
3)
Diploid sporophyte is dominant phase in the life cycle of which plant?
4)
How many chambers are there in the heart of reptiles?

11th Standard CBSE Biology Public Exam Important Question 2019-2020 - by Jyoti Hirani - Ghorakhal - Mar 03, 2020 - View & Read

1)
Which of the following characteristic of living beings, can also be observed in some non-livings?
2)
Which of the following division contains the largest number of plant species?
3)
In which of the following organisms sexes are not separate?
4)
Which of the following tissues is responsible for secondary growth?

11th Standard Biology Board Exam Sample Question 2020 - by Jyoti Hirani - Ghorakhal - Mar 03, 2020 - View & Read

1)
What is the full form of ICBN?
2)
Which is the correct word for relationship between algae and fungi in lichens?
3)
Which of the following division contains the largest number of plant species?
4)
In which of the following organisms sexes are not separate?
5)
Which of the following contains bigger sieve tubes?

11th Standard Biology Board Exam Model Question 2019-2020 - by Jyoti Hirani - Ghorakhal - Mar 03, 2020 - View & Read

1)
Which of the following scientists started the practice of using biological names?
2)
Which of the following is used in making litmus solution?
3)
Which of the following is an incorrect statement?
4)
Apical meristem is found at which of the following organs in plant?

CBSE 11th Biology - The Living World Model Question Paper - by Jyoti Hirani - Ghorakhal - Nov 20, 2019 - View & Read

1)
What is the full form of ICBN?
2)
Which is the topmost taxa in zoology?
3)
Which the topmost taxa in Botany?
4)
Which of the following can also be made in your home?
5)
Which of the following characteristic of living beings, can also be observed in some non-livings?

CBSE 11th Biology - Full Syllabus One Mark Question Paper with Answer Key - by Jyoti Hirani - Ghorakhal - Nov 04, 2019 - View & Read

1)
Which of the following scientists started the practice of using biological names?
2)
What is the full form of ICBN?
3)
Which is the topmost taxa in zoology?
4)
Which the topmost taxa in Botany?
5)
Why are biological names written in Italics?

CBSE 11th Biology - Full Syllabus Five Marks Questions - by Jyoti Hirani - Ghorakhal - Nov 01, 2019 - View & Read

1)
Some of the properties of tissues are not the properties of constituents of its cells. Give three examples to support the statement.
2)
Algae are known to reproduce asexually by a variety of spores under different environmental condition. Name these spores and the conditions under which they are produced.
3)
Write an account of general features of roundworms.
4)
Describe the various types of placentations found in flowering plants.
5)
The diagram shows some of the structures present in an animal cell.

Which of these structures is responsible for
(i) Manufacture of lipids and steroids
(ii) Release of energy
(iii) Manufacture of hormones and digestive enzymes
(iv) Production of spindle fibres in cell division
(v) Endo and exocytosis?

CBSE 11th Biology - Full Syllabus Four Marks Questions - by Jyoti Hirani - Ghorakhal - Nov 01, 2019 - View & Read

1)
Ria went to see the zoo in her town with her parents and saw many wild animals, their food habits, behavior, etc. She saw that there was a wide variety of animal life in the zoo. But she was amazed to see that the board placed in front of lion cage and monkey place which tells that both were mammals. However, she thought that they were totally different in appearance.
(i) Why lions and monkeys are considered to be mammals?
(ii) Explain the scientific reason to maintain a zoological park.
(iii) Is there any similar place to see a variety of plants? If any, then name some.
(iv) What values are shown by Ria?
2)
What is the need of a classification system in biology? How did different classification systems develop over a period of time?
3)
Cork cambium forms tissues that form the cork. Do you agree with this statement? Explain.
4)
Describe the various types of placentations found in flowering plants.
5)
How does the absorption and loss of potassium ions in the guard cells bring about the opening and closing of stomata?

CBSE 11th Biology - Full Syllabus Three Marks Questions - by Jyoti Hirani - Ghorakhal - Nov 01, 2019 - View & Read

1)
Write any three advantages of scientific names.
2)
Why is death considered as regulatory process on the earth?
3)
Define the term mycorrhiza. How are these associations affect a plant? Explain with examples
4)
Write an account on modes of respiration in animals with examples.
5)
Name the main excretory organs of cockroach. Write the structure of these organs.

CBSE 11th Biology - Full Syllabus Two Marks Questions - by Jyoti Hirani - Ghorakhal - Nov 01, 2019 - View & Read

1)
List out the features which distinguish living things from non-living things.
2)
Non-living things also grow. Explain the statement with example.
3)
In which virus two single strands RNA are present? What is the role of reverse transcriptase?
4)
Which of the organisms are called jewels of the plant world ? Elaborate about them.
5)
How would you distinguish monocots from dicots?

11th CBSE Biology - Chemical Coordination and Integration Five Marks Model Question Paper - by Lalitha Devi - Coimbatore - Oct 21, 2019 - View & Read

1)
Name the two hormone of hypothalamus that influences’ the middle lobe of pituitary. Mention their functions.
2)
List the hormones secreted by the following:
(a) Hypothalamus
(b) Pituitary
(c) Thyroid
(d) Parathyroid
(e) Adrenal
(f) Pancreas
(g) Testis
(h) Ovary
(i) Thymus
(j) Atrium
(k) Kidney
(l) G-I Tract
3)
Calcium plays a very important role in the formation of bones. Write about the role of endocrine glands and hormones responsible for maintaining calcium homoeostasis.
4)
Write short notes on the functions of the following hormones:
(a) Parathyroid hormone (PTH)
(b) Thyroid hormones
(c) Thymosins
(d) Androgens
(e) Estrogens
(f) Insulin and Glucagon
5)
Give a detail explanation of pituitary gland

11th Standard CBSE Biology - Neural Control and Coordination Five Marks Model Question Paper - by Lalitha Devi - Coimbatore - Oct 21, 2019 - View & Read

1)
Briefly describe the structure of the following:
(a) Brain (b) Eye (c) Ear
2)
Compare the following:
(a) Central neural system (CNS) and Peripheral neural system (PNS)
(b) Resting potential and action potential
3)
Explain the following processes:
(a) Polarisation of the membrane of a nerve fibre
(b) Depolarisation of the membrane of a nerve fibre
(c) Transmission of a nerve impulse across a chemical synapse
4)
Draw labelled diagrams of the following:
(a) Neuron
(b) Brain
5)
Write short notes on the following:
(a) Neural coordination
(b) Forebrain
(c) Midbrain
(d) Hindbrain
(e) Synapse

11th Standard CBSE Biology - Locomotion and Movement Five Marks Model Question Paper - by Lalitha Devi - Coimbatore - Oct 21, 2019 - View & Read

1)
Describe the important steps in muscle contraction.
2)
Explain the structure of the vertebral column of human.
3)
Write the difference between:
(a) Actin and Myosin
(b) Red and White muscles
(c) Pectoral and Pelvic girdle
4)
Describe different types of joints in the human skeleton.
5)
Differentiate between pectoral and pelvic girdle

11th Standard CBSE Biology - Excretory Products and Their Elimination Five Marks Model Question Paper - by Lalitha Devi - Coimbatore - Oct 21, 2019 - View & Read

1)
What is the function of collecting duct in kidneys?
2)
Terrestrial animals are generally either ureotelic or uricotelic, not ammonotelic, why ?
3)
The glomerular filtrate in the loop of Henle gets concentrated in the descending and then gets diluted in the ascending limbs.Explain
4)
(i) Study the given structure carefully and label the parts given as A, B, C, D and E.
(ii) Give one major function of each of these.
5)
With the help of suitable diagram describe the structure of human excretory system.

11th CBSE Biology - Body Fluids and Circulation Five Marks Model Question Paper - by Lalitha Devi - Coimbatore - Oct 21, 2019 - View & Read

1)
Write the differences between :
(a) Blood and Lymph
(b) Open and Closed system of circulation
(c) Systole and Diastole
(d) P-wave and T-wave
2)
Describe the evolutionary change in the pattern of heart among the vertebrates.
3)
Draw a standard ECG and explain the different segments in it.
4)
Explain different types of blood groups and donor compatibility making a table.

11th Standard CBSE Biology - Breathing and Exchange of Gases Five Marks Model Question Paper - by Lalitha Devi - Coimbatore - Oct 21, 2019 - View & Read

1)
Explain the role of haemoglobin in transport of oxygen.
2)
Explain the neural control of respiration.
3)
What is Tidal volume? Find out the Tidal volume (approximate value) for a healthy human in an hour.
4)
What are the major transport mechanisms for CO₂ ? Explain.
5)
Define oxygen dissociation curve. Can you suggest any reason for its sigmoidal pattern?

11th CBSE Biology - Digestion and Absorption Five Marks Model Question Paper - by Lalitha Devi - Coimbatore - Oct 18, 2019 - View & Read

1)
Name of the largest gland present in human body. Describe its role in digestion of food.
2)
How does butter in your food get digested and absorbed in the body? Explain
3)
Discuss the main steps in the digestion of proteins as the food passes through different parts of the alimentary canal.
4)
How are the activities of gastrointestinal tract regulated?
5)
What are the functions of liver?

11th Standard CBSE Biology - Plant Growth and Development Five Marks Model Question Paper - by Lalitha Devi - Coimbatore - Oct 18, 2019 - View & Read

1)
What are plant growth regulators? Name any four different chemical nature of them with one example of each.
2)
Mention the factors which prove that phytohormones act synergistically or antagonistically.
3)
Define differentiation? Also, give details about how can you distinguish between dedifferentiation and redifferentiation?
4)
Describe briefly:
(a) Arithmetic growth
(b) Geometric growth
(c) Sigmoid growth curve
(d) Absolute and relative growth rates
5)
Describe briefly Geometric growth

11th CBSE Biology - Respiration in Plants Five Marks Model Question Paper - by Lalitha Devi - Coimbatore - Oct 18, 2019 - View & Read

1)
The maximum concentration of alcohol produced by natural fermentation is 13%. But most of the alcoholic preparations for human consumption contain more than this percentage. How this higher percentage is achieved?
2)
Give a diagrammatic representation of ATP synthesis.
3)
Give a diagrammatic representation of fermentation.
4)
What is the significance of stepwise release of energy in respiration.
5)
Differentiate between Aerobic respiration and Fermentation.

11th Standard CBSE Biology - Photosynthesis in Higher Plants Five Marks Model Question Paper - by Lalitha Devi - Coimbatore - Oct 18, 2019 - View & Read

1)
Is it correct to say that photosynthesis occurs only in leaves of a plant? Besides leaves, what are the other parts be capable of carrying out photosynthesis?Justify.
2)
Give comparison between the cyclic and non-cyclic photophosphorylation.
3)
Why is RuBisCO enzyme the most abundant enzyme in the world?
4)
Six turns of Calvin cycle are required to generate one mole of glucose. Explain.
5)
What are special anatomical features displayed by leaves of C₄ -plants? How do they provide an advantage over the structure of C₃ -plants?

CBSE 11th Biology - Body Fluids and Circulation Five Marks Questions - by Jyoti Hirani - Ghorakhal - Oct 12, 2019 - View & Read

1)
A person suffering from fever is advised to take blood test. What may happen to his WEC count and why?
2)
What is meant by double circulation? What is its significance?
3)
Draw a standard ECG and explain the different segments in it.
4)
Explain different types of blood groups and donor compatibility making a table.

CBSE 11th Biology - Excretory Products and Their Elimination Five Marks Questions - by Jyoti Hirani - Ghorakhal - Oct 12, 2019 - View & Read

1)
What is the function of Henle's loop?
2)
Draw a well labelled diagram of glomerulus.
3)
What is the function of collecting duct in kidneys?
4)
Terrestrial animals are generally either ureotelic or uricotelic, not ammonotelic, why ?
5)
The glomerular filtrate in the loop of Henle gets concentrated in the descending and then gets diluted in the ascending limbs.Explain

CBSE 11th Biology - Locomotion and Movement Five Marks Questions - by Jyoti Hirani - Ghorakhal - Oct 12, 2019 - View & Read

1)
Explain the structure of the vertebral column of human.
2)
Describe the structure of the rib cage of human.
3)
Give a description of the appendicular skeleton in human.
4)
What is osteoporosis? Why are women at a greater risk of suffering from osteoporosis? Suggest some precautionary means to avoid osteoporosis.
5)
Write the difference between:
(a) Actin and Myosin
(b) Red and White muscles
(c) Pectoral and Pelvic girdle

CBSE 11th Biology - Neural Control and Coordination Five Marks Questions - by Jyoti Hirani - Ghorakhal - Oct 12, 2019 - View & Read

1)
Briefly describe the structure of the following:
(a) Brain (b) Eye (c) Ear
2)
Compare the following:
(a) Central neural system (CNS) and Peripheral neural system (PNS)
(b) Resting potential and action potential
3)
Explain the following processes:
(a) Polarisation of the membrane of a nerve fibre
(b) Depolarisation of the membrane of a nerve fibre
(c) Transmission of a nerve impulse across a chemical synapse
4)
Draw labelled diagrams of the following:
(a) Neuron
(b) Brain
5)
Write short notes on the following:
(a) Neural coordination
(b) Forebrain
(c) Midbrain
(d) Hindbrain
(e) Synapse

CBSE 11th Biology - Chemical Coordination and Integration Five Marks Questions - by Jyoti Hirani - Ghorakhal - Oct 12, 2019 - View & Read

1)
Justify the name endocrine gland.
2)
How does parathyroid hormone influences calcium uptake in the body?
3)
How do fight or flight hormones prepare our body to fight emergency?
4)
What are secondary sexual characters?
5)
Name the two hormone of hypothalamus that influences’ the middle lobe of pituitary. Mention their functions.

CBSE 11th Biology - Breathing and Exchange of Gases Five Marks Questions - by Jyoti Hirani - Ghorakhal - Oct 12, 2019 - View & Read

1)
Explain the role of haemoglobin in transport of oxygen.
2)
Give a chart of partial pressure of oxygen and carbon dioxide at different places in the respiratory system:
3)
What is Tidal volume? Find out the Tidal volume (approximate value) for a healthy human in an hour.
4)
What are the major transport mechanisms for CO₂ ? Explain.
5)
Define oxygen dissociation curve. Can you suggest any reason for its sigmoidal pattern?

CBSE 11th Biology - Digestion and Absorption Five Marks Questions - by Jyoti Hirani - Ghorakhal - Oct 12, 2019 - View & Read

1)
Name of the largest gland present in human body. Describe its role in digestion of food.
2)
How does butter in your food get digested and absorbed in the body? Explain
3)
Discuss the main steps in the digestion of proteins as the food passes through different parts of the alimentary canal.
4)
How are the activities of gastrointestinal tract regulated?
5)
What are the functions of liver?

CBSE 11th Biology - Plant Growth and Development Five Marks Questions - by Jyoti Hirani - Ghorakhal - Oct 12, 2019 - View & Read

1)
What are plant growth regulators? Name any four different chemical nature of them with one example of each.
2)
While experimentation, why do you think it is difficult to assign any effect seen to any single hormone?
3)
Mention the factors which prove that phytohormones act synergistically or antagonistically.
4)
Mention the phenomenon of growth in plants. Explain the phases of growth in detail.
5)
Define differentiation? Also, give details about how can you distinguish between dedifferentiation and redifferentiation?

CBSE 11th Biology - Respiration in Plants Five Marks Questions - by Jyoti Hirani - Ghorakhal - Oct 12, 2019 - View & Read

1)
Give a diagrammatic representation of ATP synthesis.
2)
Give a tabular representation of respiratory balance sheet.
3)
Give a diagrammatic representation of fermentation.
4)
What is the significance of stepwise release of energy in respiration.
5)
Differentiate between Aerobic respiration and Fermentation.

CBSE 11th Biology - Photosynthesis in Higher Plants Five Marks Questions - by Jyoti Hirani - Ghorakhal - Oct 12, 2019 - View & Read

1)
Is it correct to say that photosynthesis occurs only in leaves of a plant? Besides leaves, what are the other parts be capable of carrying out photosynthesis?Justify.
2)
Give comparison between the cyclic and non-cyclic photophosphorylation.
3)
What are special anatomical features displayed by leaves of C₄ -plants? How do they provide an advantage over the structure of C₃ -plants?
4)
RuBisCO is an enzyme that acts both as a carboxylase and oxygenase. Why do you think RuBisCO carries out more carboxylation in C₄ plants?
5)
Under what condition are C₄-plants superior to C₃?

CBSE 11th Biology - Mineral Nutrition Five Marks Questions - by Jyoti Hirani - Ghorakhal - Oct 12, 2019 - View & Read

1)
What are various symptoms of deficiency in plants?
2)
Explain with examples macronutrients,micronutrients,beneficial nutrients,toxic elements and essential elements.
3)
Hydroponics have been shown to be a successful technique for growing of plants, yet most of the crops are still grown on land. Why?
4)
Name at least five different deficiency symptoms in plants. Describe them and correlate them with the concerned mineral deficiency.
5)
How are the minerals absorbed by the plants?

11th Standard CBSE Biology - Transport in Plants Five Marks Questions - by Jyoti Hirani - Ghorakhal - Oct 12, 2019 - View & Read

1)
Define transpiration pull diagrammatically explain the route of transpiration pull and ascent of sap in plants.
2)
(i) With the help of well-labeled diagrams, describe the process of plasmolysis in plants, giving appropriate examples.
(ii) Explain what will happen to a plant cell if it is kept in a solution having higher water potential.
3)
Observe the given figure and answer the following questions.

(i) State the nature of the solution marked (1).
(ii) What process has been depicted in figures C to D?
(iii) What will be present in the space marked as (2)?
(iv) In which figures turgor pressure will be zero?
(v) In which figures wall pressure will be positive?
4)
A portion of transverse section of root is shown in the diagram. Label 1-5 and also write the function of parts 2 and 3. Briefly, explain the symplast pathway.
5)
Figure given below shows a plant at (a) 8 am and (b) shows the same plant at 6 pm on the same day.

(i) Name the condition shown by the plant in (b).
(ii) (a) State two environmental condition that may have led to the change in appearance of the plant.
(b) Explain how environmental conditions have brought about this change.

11th Standard CBSE Biology - Mineral Nutrition Five Marks Model Question Paper - by Lalitha Devi - Coimbatore - Oct 11, 2019 - View & Read

1)
What are various symptoms of deficiency in plants?
2)
Explain with examples macronutrients,micronutrients,beneficial nutrients,toxic elements and essential elements.
3)
Hydroponics have been shown to be a successful technique for growing of plants, yet most of the crops are still grown on land. Why?
4)
Name at least five different deficiency symptoms in plants. Describe them and correlate them with the concerned mineral deficiency.
5)
How are the minerals absorbed by the plants?

11th CBSE Biology - Transport in Plants Five Marks Model Question Paper - by Lalitha Devi - Coimbatore - Oct 11, 2019 - View & Read

1)
Define transpiration pull diagrammatically explain the route of transpiration pull and ascent of sap in plants.
2)
(i) With the help of well-labeled diagrams, describe the process of plasmolysis in plants, giving appropriate examples.
(ii) Explain what will happen to a plant cell if it is kept in a solution having higher water potential.
3)
A portion of transverse section of root is shown in the diagram. Label 1-5 and also write the function of parts 2 and 3. Briefly, explain the symplast pathway.
4)
Differentiate between the following - Apoplast and Symplast pathways of movement of water in plants
5)
Differentiate between the following -Guttation and Transpiration

11th Standard CBSE Biology - Cell Cycle and Cell Division Five Marks Questions - by Jyoti Hirani - Ghorakhal - Oct 09, 2019 - View & Read

1)
Which cell in humans does not have capacity to repair through cell division?
2)
Briefly describe the significance of cell division.
3)
Describe briefly the phases of meiotic cell division.
4)
Explain meiosis-II in an animal cell.
5)
Explain why a pair of homologous chromosomes is genetically different, but a pair of sister chromatids is genetically identical before crossing over in meiosis.

11th Standard CBSE Biology - Biomolecules Five Marks Questions - by Jyoti Hirani - Ghorakhal - Oct 09, 2019 - View & Read

1)
Discuss the types of enzyme cofactors that are required for the efficient activity for enzymes.
2)
What is the concept of metabolism? What are the metabolic basis for living?
3)
(i) Identify the structure shown in figure.
(ii) Write the measurement (distance) of the parts marked (A), (B), (C).

(iii) How many H-bonds are there at the place marked as(6)?
(iv) Which form of DNA is shown in the figure?
(v) Whether B type DNA has left-handed spiral structure or right-handed?
4)
Illustratea glycosidic, peptide and a phosphodiester bond.
5)
Find and write down structures of 10 interesting small molecular weight biomolecules. Find if there is any industry which manufactures the compounds by isolation. Find out who are the buyers.

11th Standard CBSE Biology - Cell: The Unit of Life Five Marks Questions - by Jyoti Hirani - Ghorakhal - Oct 09, 2019 - View & Read

1)
Differentiate between prokaryotic and eukaryotic cells.
2)
What is endome.mbrane system in a cell?
3)
What is the benefit of cell walls, in plant cells?
4)
The diagram shows some of the structures present in an animal cell.

Which of these structures is responsible for
(i) Manufacture of lipids and steroids
(ii) Release of energy
(iii) Manufacture of hormones and digestive enzymes
(iv) Production of spindle fibres in cell division
(v) Endo and exocytosis?
5)
Describe the structure of the following with the help of labelled diagrams.
(i) Nucleus
(ii) Centrosome

11th Standard CBSE Biology - Structural Organisation in Animals Five Marks Questions - by Jyoti Hirani - Ghorakhal - Oct 09, 2019 - View & Read

1)
Stratified epithelial cells have limited role in secreation . Justify their role in our skin
2)
Why are neurons called excitable cells ? Mention thge special features of the membrane of the neuron?
3)
Differences Between Blatta orientalis (oriental cockroach) and peripalnata americana (Aamerican cockroach).
4)
Distinguish between a male cockroach and female cockroach.
5)
Distinguish between a male frog and female frog.

11th Standard CBSE Biology - Anatomy of Flowering Plants Five Marks Questions - by Jyoti Hirani - Ghorakhal - Oct 09, 2019 - View & Read

1)
What is the difference between lenticels and stomata
2)
Deciduous plants shed their leaves during hot summer or autumn. This process of shedding of keaves is called abscission .Apart from physiological changes, what anatomical mechanism is involved in the abscission of leaves?
3)
What is the commercial source of cork?How is it formed?
4)
Explain the process of secondary growth in the stems of woody angiosperms. What is its significance?
5)
Define the following terms:
(a) Aestivation
(b) Placentation
(c) Actinomorphic
(d) Zygomorphic
(e) Superior ovary
(f) Perigynous flower
(g) Epipetalous stamen

11th Standard CBSE Biology - Morphology of Flowering Plants Five Marks Questions - by Jyoti Hirani - Ghorakhal - Oct 09, 2019 - View & Read

1)
Compare the androecium of family-Fabaceae, Solanaceae, and Liliaceae.
2)
Write the medicinal value of family -Fabaceae, Solanaceae, and Liliaceae
3)
Describe the modification of stem with suitable examples. "Thorns"
4)
Describe the modification of stem with suitable examples. "Fleshy stems"
5)
How do various leaf modifications help plants?

11th Standard CBSE Biology - Animal Kingdom Five Marks Questions - by Jyoti Hirani - Ghorakhal - Oct 09, 2019 - View & Read

1)
What are basis of classification of Animal Kingdom? Give detail on levels of organisation.
2)
What are the symmetries based on which animals can be classified? Describe with appropriate diagram.
3)
Write short notes on following:
(a) Diploblastic and Triploblastic Organization
(b) Different types of coelom
(c) Segmentation
(d) Notochord
4)
Give a diagrammatic representation of the Animal Kingdom based on broad features.
5)
What are the key features of phylum Porifera? Write in detail.

11th CBSE Biology - Cell Cycle and Cell Division Five Mark Model Question Paper - by Lalitha Devi - Coimbatore - Oct 04, 2019 - View & Read

1)
Give a description of metaphase I of meiosis
2)
What is the process of cell division in prokaryotes?
3)
Briefly describe the significance of cell division.
4)
Describe briefly the phases of meiotic cell division.
5)
Explain meiosis-II in an animal cell.

11th Standard CBSE Biology - Biomolecules Five Mark Model Question Paper - by Lalitha Devi - Coimbatore - Oct 04, 2019 - View & Read

1)
What are the functions of polysaccharides?
2)
What is the concept of metabolism? What are the metabolic basis for living?
3)
Illustratea glycosidic, peptide and a phosphodiester bond.
4)
Find and write down structures of 10 interesting small molecular weight biomolecules. Find if there is any industry which manufactures the compounds by isolation. Find out who are the buyers.
5)
Give a detail explanation of structure of protein.

11th CBSE Biology - Cell: The Unit of Life Five Mark Model Questions - by Lalitha Devi - Coimbatore - Oct 03, 2019 - View & Read

1)
The diagram shows some of the structures present in an animal cell.

Which of these structures is responsible for
(i) Manufacture of lipids and steroids
(ii) Release of energy
(iii) Manufacture of hormones and digestive enzymes
(iv) Production of spindle fibres in cell division
(v) Endo and exocytosis?
2)
Describe the structure of the following with the help of labelled diagrams.
(i) Nucleus
(ii) Centrosome
3)
Name two cell-organelles that are double membrane bound. What are the characteristics of these two organelles? State their functions and draw labelled diagrams of both.
4)
What is a centromere? How does the position of centromere form the basis of classification of chromosomes. Support your answer with a diagram showing the position of centromere on different types of chromosomes.
5)
With suitable diagram describe animal cell.

11th CBSE Biology - Structural Organisation in Animals Five Mark Model Questions - by Lalitha Devi - Coimbatore - Oct 03, 2019 - View & Read

1)
Stratified epithelial cells have limited role in secreation . Justify their role in our skin
2)
Differences Between Blatta orientalis (oriental cockroach) and peripalnata americana (Aamerican cockroach).
3)
Distinguish between a male cockroach and female cockroach.
4)
Describe various types of epithelial tissues with the help of labelled diagrams.
5)
With the help of appropriate diagrams explain various kinds of muscular tissues with their junctions.

CBSE 11th Biology - The Living World Five Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 30, 2019 - View & Read

1)
What is meant by living ? Give any four defining features of life forms.
2)
Some of the properties of tissues are not the properties of constituents of its cells. Give three examples to support the statement.
3)
Brassica campestris Linn
(i) Give the common name of the plant.
(ii) What do the first two parts of the name denote?
(iii) Why are they written in italics?
(iv) What is the meaning of Linn written at the end of the name?
4)
Try to collect all the currently accepted meanings for the word ‘species’. Discuss with your teacher the meaning of species in case of higher plants and animals on one hand, and bacteria on the other hand.
5)
A scientist came across a plant, which he feels is a new species. How will he proceed towards its identification, classification and nomenclature?

11th Standard CBSE Biology - Biological Classification Five Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 30, 2019 - View & Read

1)
Biological classification is a dynamic and ever-evolving phenomenon which keeps changing with our understanding of life forms. Justify the statements by taking any two examples.
2)
What is three domain system? Who introduced it? Name these domains and their salient features.
3)
Describe the cell structure of fungus in details
4)
Write difference between ascocarp and basidiocarp
5)
Give a brief account of viruses with respect to their structure and nature of genetic materials. Also, name four common viral diseases.

11th Standard CBSE Biology - Plant Kingdom Five Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 30, 2019 - View & Read

1)
Algae are known to reproduce asexually by a variety of spores under different environmental condition. Name these spores and the conditions under which they are produced.
2)
Mention the ploidy of the following: protonemal cell of a moss; primary endosperm nucleus in dicot, leaf cell of a moss; prothallus cell of a ferm; gemma cell in Marchantia; meristem cell of monocot, ovum of a liverwort, and zygote of a fern.
3)
What role does vascular plants play in keeping the earth green? Which features help them to dominate the earth?
4)
How is natural system different from artificial system of classification? List some features.
5)
What is heterospory? Briefly comment on its significance. Give two examples.

CBSE 11th Biology - Respiration in Plants Three Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 28, 2019 - View & Read

1)
Name the end products of aerobic and anaerobic fate of glycolysis.List two ways by which molecules of ATP are produced in glycolysis during aerobic respiration in a cell.
2)
It is known that red muscle fibres in animals can work for longer periods of time continuously. How is this possible?
3)
Name the site(s) of pyruvate synthesis.Also, write the chemical reaction, wherein pyruvic acid dehydrogenase acts as a catalyst.
4)
What is Pentose Phosphate Pathway(PPP)? Where does it take place?
5)
The energy yield in terms of ATP is higher in aerobic respiration than during anaerobic respiration. Why is there anaerobic respiration even in organisms that live in aerobic condition like human beings and angiosperms?

CBSE 11th Biology - Plant Growth and Development Three Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 28, 2019 - View & Read

1)
How are gibberellins useful in agriculture to improve productivity. Give any three points in support of your answer.
2)
The role of ethylene and abscisic acid is both positive and negative. Justify the statement.
3)
Both animals and plants grow. Why do we say that growth and differentiation in plants is open and not so in animals? Does this statement hold true for sponges also?
4)
Nicotiana tobacum,(tobacco) a short-day plant, when exposed to more than the critical period of light fails to flower. Explain.
5)
If the critical photoperiod for a short-day plant is 13hrs of daylight, will it flower when there are 15 hrs of daylight?

CBSE 11th Biology - Digestion and Absorption Three Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 28, 2019 - View & Read

1)
How is fat absorbed in the blood?
2)
What would happen if HCl will not be secreted in the stomach?
3)
Distinguish between constipation and indigestion.Mention their major causes.
4)
Explain the action of different enzymes in succus entericus.
5)
Give the name along with the function of each of the three major kinds of cells of the gastric glands.

CBSE 11th Biology - Breathing and Exchange of Gases Three Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 28, 2019 - View & Read

1)
State the route of foul air from the lungs to outside. Also state whether TV increases or decreases during excitement and activity.
2)
How is respiration regulated?
3)
Explain chemical control of respiratory rhythm
4)
Why is it not advisable to sleep in closed rooms warmed with burning of coals continuously?
5)
Which of the regulatory centre of respiration can reduce the inspiratory duration when it is stimulated?

CBSE 11th Biology - Excretory Products and Their Elimination Three Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 28, 2019 - View & Read

1)
Show the structure of a renal corpuscle with the help of a diagram
2)
What is ureotelism? Describe the process of formation of urea.
3)
Where does the urine formation take place? Name the processes involved in the formation of urine.
4)
Where do ultrafiltration, reabsorption, and secretion occur in a nephron?
5)
How is glomerular filtrate hypertonic and hypotonic in descending and ascending limb of loop of Henle,respectively.What is the effect of ADH on collecting tubules.

CBSE 11th Biology - Neural Control and Coordination Three Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 28, 2019 - View & Read

1)
Differentiate between Dendrites and axons
2)
Explain the role of Na⁺ in the generation of action potential.
3)
Differentiate between Cerebrum and cerebellum.
4)
Differentiate between Thalamus and hypothalamus
5)
Answer briefly
(i) How do you perceive the colour of an object?
(ii) Which part of our body helps us in maintaining the body balance?
(iii) How does the eye regulate the amount of light that falls on the retina?

11th Standard CBSE Biology - Locomotion and Movement Three Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 28, 2019 - View & Read

1)
How do you distinguish between a skeletal muscle and a cardiac muscle.
2)
In old age, people often suffer from stiff and inflammed joints. What is this condition called? What are the possible reasons for these symptoms?
3)
Write a few lines about gout
4)
Describe the important steps in muscle contraction.
5)
Why are muscles rigidly locked in whatever position they are after death? What is the phenomenon known as?

11th Standard CBSE Biology - Body Fluids and Circulation Three Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 28, 2019 - View & Read

1)
What is the significance of hepatic portal system in the circulatory system?
2)
Why renal portal system is absent in mammals?
3)
An Rh^- woman is carrying an Rh⁺ foetus for the second time. Describe the consequences of Rh^- incompatibility in this case?
4)
Explain the chemical events that takes place to form a blood clot to seal the wound.
5)
Answer the following
(i) Name the major site where RBCs are formed.
(ii) Which part of heart is responsible for initiating and maintaining its rhythmic activity?
(iii) What is specific in the heart of crocodiles among reptilians?

11th Standard CBSE Biology - Photosynthesis in Higher Plants Three Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 28, 2019 - View & Read

1)
Explain how during light reaction of photosynthesis, ATP synthesis as a chemiosmotic phenomenon takes place?
2)
Even though a very few cells in a C₄ plant carry out the biosynthetic – Calvin pathway, yet they are highly productive. Can you discuss why?
3)
What can we conclude from the statement that the action and absorption spectra of photosynthesis overlap? At which wavelength, do they show peaks?
4)
Photosynthetic organisms occur at different depths in the ocean. Do they receive the light?How do they adapt to carry out photosynthesis under these conditions?
5)
What conditions enable RuBisCO to function as an Oxygenase? Explain the ensuring process.

11th Standard CBSE Biology - Mineral Nutrition Three Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 28, 2019 - View & Read

1)
Mention the difference between passive and active salt absorption.
2)
Write two names for each of the following
(i) Free-living, nitrogen-fixing cyanobacteria.
(ii) Free-living, aerobic, nitrogen-fixing bacteria
(iii) Symbiotic, nitrogen-fixing bacteria.
3)
A section of root nodule of chick-pea plant appears pink
(i) Name the pigment, responsible for pink colour.
(ii) What is the role of this pigment in the nodule formation?
(iii) Explain the process of biological nitrogen-fixation in the root nodules in short.
4)
Describes nitrification along with the equations and the organisms involved in each step.
5)
Name the most crucial enzyme found in root nodules for N₂-fixation. Does it require a special pink coloured pigment for its functioning? Elaborate.

11th Standard CBSE Biology - Transport in Plants Three Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 28, 2019 - View & Read

1)
What happens when a pressure greater than the atmospheric pressure is applied to pure water or a solution?
2)
Describe at least three major functions of turgor pressure.
3)
Under what condition the rate of transpiration will be maximum, when soil is dry and atmosphere is humid or when soil is humid and atmosphere is dry? given reason.
4)
Identify the process occurring in I, II and III.

11th Standard CBSE Biology - Chemical Coordination and Integration Three Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 28, 2019 - View & Read

1)
Mention the major classes of hormones released in humans. Give the examples of each.
2)
What is meant by 'antagonistic effect? Illustrate your answer with an example
3)
How do you justify the statement that hormones of adrenal medulla are emergency hormones?

4)

Fill up the blank spaces (i) - (vi) in the table given below

Name of Endocrine Gland	Secreted Hormone	Functions of the Hormone
Pituitary	(i)	Reabsorption of water and electrolytes in the kidney
(ii) ..........	Insulin	(iii) .....
Thymus	Thymosins	(iv) .....
Ovary	(v) .... and
(vi) .....	Thyroxine	Development of growing ovarian follicles controls the metabolism of proteins, fats and carbohydrates.

5)
How does progesterone function in a human female?

CBSE 11th Standard Biology - Anatomy of Flowering Plants Five Mark Question Paper - by Lalitha Devi - Coimbatore - Sep 25, 2019 - View & Read

1)
What is the difference between lenticels and stomata
2)
What is the commercial source of cork?How is it formed?
3)
Define the following terms:
(a) Aestivation
(b) Placentation
(c) Actinomorphic
(d) Zygomorphic
(e) Superior ovary
(f) Perigynous flower
(g) Epipetalous stamen
4)
Describe modifications of stem with suitable examples.
5)
What is a flower? Describe the parts of a typical angiosperm flower.

CBSE 11th Standard Biology - Morphology of Flowering Plants Five Mark Question Paper - by Lalitha Devi - Coimbatore - Sep 25, 2019 - View & Read

1)
Write the description of gynoecium in various plants.
2)
Describe the modification of stem with suitable examples.
(a) Tendrils
(b) Thorns
(c) Fleshy stems
3)
Describe the modification of stem with suitable examples. "Fleshy stems"
4)
Stolon,offset and rhizome are different forms of stem modification. How can these modifiedforms of stem be distinguished from each other?
5)
Explain with suitable examples the different types of phyllotaxy.

11th Standard CBSE Biology - Anatomy of Flowering Plants Three Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 24, 2019 - View & Read

1)
Write the characteristics of heartwood and sapwood.
2)
What are the charecteristic difference found in vascular tissu of gymnosperms and angiosperms?
3)
While eating peach or pear, it is usually seen that some stone-like structures get entangled in the teeth. What are these stone-like structures called?
4)
Explain the formation of vascular cambium.
5)
Distinguish between sapwood and heartwood .

11th Standard CBSE Biology - Structural Organisation in Animals Three Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 24, 2019 - View & Read

1)
Why is the body cavity of cockroach called haemocoel? Name the different layer of body wall in it.
2)
Name the main excretory organs of cockroach. Write the structure of these organs.
3)
Mention the similarities between Cardiac and skeletal muscles.
4)
Mention the special features of eye in cockroach.
5)
Difference between keratinised and non keretinised stratified squamous epitheila

CBSE 11th Standard Biology - Cell: The Unit of Life Three Marks Question Paper - by Jyoti Hirani - Ghorakhal - Sep 24, 2019 - View & Read

1)
What are plasmids? Describe their role in bacteria.
2)
Give the biochemical composition of the plasma membrane.How are lipid molecules arranged in the membrane?
3)
The lysosomal enzyme does not destroy the cell's own cytoplasm.why?
4)
State the chief functions of mitochondria.
5)
In what respect the mitochondria and plastids resemble the bacteria.

11th Standard CBSE Biology - Biomolecules Three Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 24, 2019 - View & Read

1)
Succinic dehydrogenase is an enzyme that causes the substrate, succinate, to break down into fumarate
Malonate is a substance that resembles succinate and inhibits the activity of succinic dehydrogenase
Explain how this type of inhibition affects the activity of the enzyme
2)
Find out how much cellulose is made by all the plants in the biosphere and compare it with how much of paper is manufactured by man and hence what is the consumption of plant material by man annually. What a loss of vegetation!
3)
Explain the composition of triglyceride.
4)
Is rubber a primary metabolite or a secondary metabolite? Write four sentence about rubber?
5)
Differentiate between anabolism and catabolism, along with an example for each.

11th Standard CBSE Biology - Cell Cycle and Cell Division Three Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 24, 2019 - View & Read

1)
Distinguish anaphase of mitosis from anaphase I of meiosis.
2)
Name three phases of interphase. Give one major event of each phase.
3)
Both unicellular and multicellular organisms undergo mitosis. What are the differences if any observed in the process between the two?
4)
(i) Name the stages and type of cell division represented in A and B, repectively.

(ii) Also explain any one of them.
5)
Find examples where the four daughter cells from meiosis are equal in size and where they are found unequal in size.

11th CBSE Biology - Animal Kingdom Five Mark Question Paper - by Lalitha Devi - Coimbatore - Sep 24, 2019 - View & Read

1)
Which features make mammals as most successful and dominant animals?
2)
List out various excretory organs in different animals
3)
Describe briefly the body wall of sponges.
4)
Differentiate between polyp and medusa
5)
List any six features of cartilaginous fishes.Give four examples of these.

11th Standard CBSE Biology - Plant Kingdom Five Mark Question Paper - by Lalitha Devi - Coimbatore - Sep 24, 2019 - View & Read

1)
Mention the ploidy of the following: protonemal cell of a moss; primary endosperm nucleus in dicot, leaf cell of a moss; prothallus cell of a ferm; gemma cell in Marchantia; meristem cell of monocot, ovum of a liverwort, and zygote of a fern.
2)
How is natural system different from artificial system of classification? List some features.
3)
Describe the important characteristics of gymnosperms.
4)
What is heterospory? Briefly comment on its significance. Give two examples.
5)
Name three groups of plants that bear archegonia. Briefly describe the life cycle of any one of them.

11th Standard CBSE - Biology - Biological Classification Five Mark Question Paper - by Lalitha Devi - Coimbatore - Sep 23, 2019 - View & Read

1)
What is the role of methanogens?
2)
What is the need of a classification system in biology? How did different classification systems develop over a period of time?
3)
Biological classification is a dynamic and ever-evolving phenomenon which keeps changing with our understanding of life forms. Justify the statements by taking any two examples.
4)
Write difference between ascocarp and basidiocarp
5)
List any six diseases caused by these classes of fungi

11th CBSE Biology - The Living World Five Mark Question Paper - by Lalitha Devi - Coimbatore - Sep 23, 2019 - View & Read

1)
Write a brief note on three domains of life.
2)
Ria went to see the zoo in her town with her parents and saw many wild animals, their food habits, behavior, etc. She saw that there was a wide variety of animal life in the zoo. But she was amazed to see that the board placed in front of lion cage and monkey place which tells that both were mammals. However, she thought that they were totally different in appearance.
(i) Why lions and monkeys are considered to be mammals?
(ii) Explain the scientific reason to maintain a zoological park.
(iii) Is there any similar place to see a variety of plants? If any, then name some.
(iv) What values are shown by Ria?
3)
What is meant by living ? Give any four defining features of life forms.
4)
Brassica campestris Linn
(i) Give the common name of the plant.
(ii) What do the first two parts of the name denote?
(iii) Why are they written in italics?
(iv) What is the meaning of Linn written at the end of the name?
5)
A scientist came across a plant, which he feels is a new species. How will he proceed towards its identification, classification and nomenclature?

11th Standard CBSE Biology - Morphology of Flowering Plants Three Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 21, 2019 - View & Read

1)
A typical angiospermic flower consists of four floral parts. Give the names of the floral parts and their arrangement sequentially.
2)
Which structures form gynoecium? How is placenta related to gynoecium? What are its types?
3)
Differentiate between bract and bractole.
4)
Name the type of placentation shown in the given figures and give one example of each.
5)
What is the function of companion cells in phloem?

11th Standard CBSE Biology - Animal Kingdom Three Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 21, 2019 - View & Read

1)
Organ system in different groups of animals exhibits various patterns of complexities. Explain
2)
How useful is the study of the nature of body cavity and coelom in the classification of animals?
3)
What are the difficulties that you would face in classification of animals, if common fundamental features are not taken into account?
4)
Differentiate between notochord and nerve cord
5)
List out any six general features of cartilaginous fishes

11th Standard CBSE Biology - Plant Kingdom Three Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 20, 2019 - View & Read

1)
What characters are used in natural system of classification? Explain with examples.
2)
Describe the type of photosynthetic pigment in red algae,green algae and brown algae.
3)
Write a brief account of mosses.
4)
What is the habitat of ferns. Describe their plant body. Explain the nature of spores ferns have. List out some common ferns.
5)
What is the advantage of the development of seed habits in seed plants?

11th Standard CBSE Biology - Biological Classification Three Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 20, 2019 - View & Read

1)
Why slime moulds are called fungus animals? Name some slime moulds
2)
What obsevable features in Trypanosoma would make you classify it under kingdom-Protista?
3)
Give the name of the hosts of malarial parasite Plasmodium.
4)
When did cyanobacteria evolved? Why are they referred as the earliest colonisers of barren areas?
5)
Justify the statement Euglena is a taxonomic puzzle.

11th Standard CBSE Biology Unit 1 The Living World Three Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 20, 2019 - View & Read

1)
Why are the classification systems changing every now and then?
2)
What different criteria would you choose to classify people that you meet often?
3)
Define a taxon. Give some examples of taxa at different hierarchical levels.
4)
What are the obligate categories? How these are different from intermediate categories. List out some intermediate categories.
5)
In which fields taxonomical aids are helpful? Why taxonomic aids are used in these studies? Which different taxonomical aids are used by the biologists?

11th CBSE Biology - Chemical Coordination and Integration Two Marks Question - by Jyoti Hirani - Ghorakhal - Sep 19, 2019 - View & Read

1)
Which hormone is secreated by heart? Mention its role.
2)
What is the role of second messenger in protein hormone action?
3)
Explain amplification of a signal in hormone action? What is its role?
4)
What is meant by 'synergistic effect'? Explain with an example
5)
Inflammatory responses can be controlled by a certain steroid.Name the steroid, its source and also its other important functions.

CBSE 11th Biology - Neural Control and Coordination Two Marks Question - by Jyoti Hirani - Ghorakhal - Sep 19, 2019 - View & Read

1)
Differentiate between:
(a) Myelinated and non-myelinated axons
(b) Dendrites and axons
(c) Thalamus and Hypothalamus
(d) Cerebrum and Cerebellum
2)
Compare the following "Resting potential and action potential"
3)
Write a short note on neural coordination.
4)
Explain the significance of saltatory conduction.
5)
Arrange the following n the order of reception and transmission of sound wave from the ear drum Cochlear nerve, external auditory canal, ear drum, stapes incus, malleus, cochlea

CBSE 11th Biology - Locomotion and Movement Two Marks Question - by Jyoti Hirani - Ghorakhal - Sep 19, 2019 - View & Read

1)
What kind of muscle fibers are richly found in the extensor muscles of the back? What characteristics enable these fibres to serve their purpose?
2)
Why is muscle fibre a syncitium? How are myofilaments arranged in it?
3)
What are floating ribs? How many of them are there in the human body?
4)
Give function of a sternum.
5)
Why do muscles fatigue?

CBSE 11th Biology - Excretory Products and Their Elimination Two Marks Question - by Jyoti Hirani - Ghorakhal - Sep 19, 2019 - View & Read

1)
How does ADH regulate body fluid volume.Explain?
2)
Describe the role of alcohol and caffeine in the concentration of urine.
3)
Discuss the regulation of kidney function by the heart.
4)
State the importance of counter current systems in renal functioning.
5)
What will happen if the stretch receptors of the urinary bladder wall are totally removed? Explain.

CBSE 11th Biology - Body Fluids and Circulation Two Marks Question - by Jyoti Hirani - Ghorakhal - Sep 19, 2019 - View & Read

1)
Mention the causes of high blood pressure.
2)
Which coronary artery disease is caused due to narrowing of the lumen of arteries?
3)
Give the reason for reduced blood flow to the heart muscles leading to their death.
4)
What are two heart sounds? When and how are these sounds produced?
5)
Explain heart sounds.

11th Standard CBSE Biology - Breathing and Exchange of Gases Two Marks Question - by Jyoti Hirani - Ghorakhal - Sep 19, 2019 - View & Read

1)
State the factors affecting the oxygen haemoglobin binding.
2)
What does the oxygen haemoglobin dissociation curve indicate?
3)
What is the role of carbonic anhydrase in humans?
4)
Define vital capacity. What is its significance?
5)
What is Adam's apple? Is it more prominent in males or females?

11th Standard CBSE Biology - Digestion and Absorption Two Marks Question - by Jyoti Hirani - Ghorakhal - Sep 19, 2019 - View & Read

1)
'Digestion of starch starts in the buccal cavity, but stops in the stomach'. Comment
2)
What is the action of salivary amylase?
3)
What is the location of ileocaecal valve in the alimentary canal of the human? Mention it's role.
4)
State the role of pancreas in human body. Also mention, what will happen to a person, if the pancreas does not work properly?
5)
Mention the causative factors for indigestion

11th Standard CBSE Biology - Plant Growth and Development Two Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 18, 2019 - View & Read

1)
Explain inhibitory effect of auxins with the help of one example
2)
In a slide showing different types of cells, can you identify which type of the cell may be meristematic and the one which is incapable of dividing and how?
3)
In an experiment, the callus produced from internodal segments did not proliferate until coconut water was added. Given person
4)
How does spraying of sugarcane plants with gibberellins increase the yield of sugar?
5)
Explain what is meant by the terms auxin precursors, anti-auxins, free auxins and bound auxins

11th Standard CBSE Biology - Respiration in Plants Two Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 18, 2019 - View & Read

1)
ATP produced during glycolysis is a result of substrate level phosphorylation. Explain
2)
What is fermentation?Name any two organic compounds produced in the process.
3)
What are the main steps in aerobic respiration? Where does it take place?
4)
Oxygen is critical for aerobic respiration. Explain its role with respect to ETS.
5)
Where is cytochrome-c located? What is its function?

11th Standard CBSE Biology - Photosynthesis in Higher Plants Two Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 18, 2019 - View & Read

1)
ATPase enzyme consists of two parts. What are those parts? How are they arranged in the thylakoid membrane? The conformational changes occur in which part of the enzyme?
2)
What is the basis for designating C₃ and C₄ pathways of photosynthesis?
3)
Mention any two reasons, which prove that photosynthesis is essential for sustaining life on the earth.
4)
Cyanobacteria and some other photosynthetic bacteria do not have chloroplasts.How do they conduct photosynthesis?
5)
By looking at a plant externally can you tell whether a plant is C₃ or C₄? Why and how?

11th Standard CBSE Biology - Mineral Nutrition Two Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 18, 2019 - View & Read

1)
Prior to sowing rice, a legume crop is cultivated and ploughed back in the field, why?
2)
'All elements that are present in a plant need not be essential to its survival'.Comment.
3)
How is sulphur important for plants?Name the amino acid in which it is present.
4)
Plants of leguminous family usually contain more amount of protein than other plants? If yes, justify.
5)
Nitrogen-fixation is shown by prokaryotes and not by eukaryotes. Comment.

11th Standard CBSE Biology - Transport in Plants Two Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 18, 2019 - View & Read

1)
What are the different factors that affect the rate of diffusion?
2)
What are proteins? what role do they play in diffusion?
3)
Will the ascent of sap be possible without the cohesion and adhesion of water molecules?Explain.
4)
Distinguish between exosmosis and endosmosis
5)
State any two functions of turgor pressure

11th Standard CBSE Biology - Cell Cycle and Cell Division Two Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 16, 2019 - View & Read

1)
What is G_o (quiescent phase) of cell cycle?
2)
Why do the chromosomes become short and thick in prophase?
3)
What is metaphasic plate?
4)
List the difference between metaphase of mitosis and metaphase-I of meiosis.
5)
Why is mitosis called equational division?

11th Standard CBSE Biology - Biomolecules Two Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 16, 2019 - View & Read

1)
Proteins have been called 'biological polymers' Explain.
2)
Arrange the following carbohydrates in the order of increasing complexity of chemical structures - fructose, starch, oligosaccharide, maltose, triose.
3)
Glycine and alanine are different with respect to one substituent on the \(\alpha -\) carbon. What are the other common substituent groups?
4)
Name of the product formed by esterification of glycerol with a fatty acid. Also draw its structure.
5)
What is trihydroxy propane commonly called? Write its structural formula.

11th Standard CBSE Biology - Cell: The Unit of Life Two Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 16, 2019 - View & Read

1)
What is a mesosome in a prokaryotic cell? Mention the functions that it performs.
2)
What are inclusion bodies in prokaryotic cell?
3)
What are the main structures within the cell nucleus?
4)
What are nuclear pores? State their function.
5)
Discuss briefly the role nucleolus in the cell actively involved in protein synthesis.

11th Standard CBSE Biology - Structural Organisation in Animals Two Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 16, 2019 - View & Read

1)
What is the yellow bone marrow ? what is its function and loction?
2)
List out the important features of hyaline cartilage.
3)
Describe the form, size, color, and symmetry of cockroach?
4)
Explain the term "sclerites"
5)
Mention the speciual features of eye in cockroach.

CBSE 11th Biology Anatomy of Flowering Plants Two Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 16, 2019 - View & Read

1)
How the study of anatomy is useful to us ?
2)
Name those parenchymatous cells which are associated with sieve tube in angiosperms. Mention their roll also
3)
How does the periderm formation take place in the dicot stems?What are its components?
4)
Differentiate between pith in dicot root and moncot root.
5)
Write one differences between mesophyll of dicot leaf and a monocot leaf.

CBSE 11th Biology Morphology of Flowering Plants Two Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 14, 2019 - View & Read

1)
You have heard about several insectivorous plant that feed on insects. Nepenthes or the pitcher plant is one such example which usually grows in shallow water or in marsh lands. What part of the plant is modified into a 'pitcher'. How does this modification help the plant for food even though it can photosynthesisie like any other green plant?
2)
Describe the structure of a fruit with the help of a diagram.
3)
Name of the ornamental plants of lily family
4)
Explain the following floral formula and to which it belongs \(Ebr\oplus \ { K }_{ 2+2 }{ C }_{ 4 }{ A }_{ 2+4 }{ G }_{ (\underset { - }{ 2 } ) }\)
5)
How will you show the monocarpellary and unilocular condition of gynoecium of Lathrus odoratus (sweet pea)?

11th Standard CBSE Biology - Animal Kingdom Two Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 14, 2019 - View & Read

1)
Difference between the complete and incomplete digestive system.
2)
Define the terms amphids and phasmids found in Aschelminthes.
3)
Name a molluscs which has an internal shell and which does not have a shell?
4)
Why Peripatus is called a connecting link between annelids and arthropods?
5)
Describe the respiratory system of birds

11th Standard CBSE Biology - Plant Kingdom Two Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 14, 2019 - View & Read

1)
Write few important features of mosses
2)
Which pteridophyte are useful in nitrogen-fixation and how?
3)
Give one word answer for following.
(i) In brown algae, what is the function of frond present?
(ii) Name the constituents of cell wall in green algae.
4)
Which gymnosperm provide these items?
i) Taxol
ii) Cabada balsam
iii) Tannius
iv) Copal
5)
You are given microsporophyll of gymnosperms and angiosperms without any labeling. How will you differentiate both?

11th CBSE Biology - Biological Classification Two Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 14, 2019 - View & Read

1)
Plants are autotrophic. Can you think of some plants that are partially heterotrophic?
2)
What are bacteriophages and their types? Identify their shape.
3)
How do fungi form partnership with most plants?
4)
How are viroids different from viruses?
5)
What are the main criteria used for five kingdom system of classification?

11th CBSE Biology The Living World Two Marks Questions - by Jyoti Hirani - Ghorakhal - Sep 14, 2019 - View & Read

1)
Properties of cell organelles are not always found in the molecular constituents of cell organelles. Justify.
2)
Reproduction cannot be the defining characteristic of living organisms.Justify.
3)
How are living organisms divided into different taxa? What is the name given to this process?
4)
Brinjal and potato belong to the same genus Solanum, but two different species. What defines them as separate species?
5)
Why there is a need to standardise the system of naming of living organisms?

CBSE 11th Biology - Chemical Coordination and Integration Book Back Questions - by Jyoti Hirani - Ghorakhal - Sep 10, 2019 - View & Read

1)
Hypothalamic hormones : ______.
2)
Thyrotrophin (TSH) : ______.
3)
Corticotrophin (ACTH) : _______.
4)
Gonadotrophins (LH, FSH) : _______.
5)
Melanotrophin (MSH) : _______.

CBSE 11th Biology - Neural Control and Coordination Book Back Questions - by Jyoti Hirani - Ghorakhal - Sep 10, 2019 - View & Read

1)
The region of the vertebrate eye, where the optic nerve passes out of the retina, is called the ______.
2)
Name the small tubular gap structure between the two neurons
3)
What is the nature of nerve impulse?
4)
Which part of the war determines the pitch of a sound?
5)
Which is the bluish (pigmented) layer present beneath the sclera?

CBSE 11th Biology - Locomotion and Movement Book Back Questions - by Jyoti Hirani - Ghorakhal - Sep 10, 2019 - View & Read

1)
All mammals (except a few) have_______________________ cervical vertebra.
2)
The number of phalanges in each limb of human is___________________________
3)
Thin filament of myofibril contains 2 'F' actins and two other proteins namely_________________ and_________________
4)
______________and______________ pairs of ribs are called floating ribs.
5)
Actin is present in thin filament

CBSE 11th Biology - Excretory Products and Their Elimination Book Back Questions - by Jyoti Hirani - Ghorakhal - Sep 10, 2019 - View & Read

1)

Match the items of column I with those of column II:

Column I		Column II
(a)	Ammonotelism	(i)	Birds
(b)	Bowman’s capsule	(ii)	Water reabsorption
(c)	Micturition	(iii)	Bony fish
(d)	Uricotelism	(iv)	Urinary bladder
(d)	ADH	(v)	Renal tubule

2)
Bowman's capsule
3)
Micturition
4)
Uricotelism
5)
ADH

CBSE 11th Biology - Body Fluids and Circulation Book Back Questions - by Jyoti Hirani - Ghorakhal - Sep 10, 2019 - View & Read

1)

Match column I with column II:

Column I			Column II
(a)	Eosinophils	(i)	Coagulation
(b)	RBC	(ii)	Universal Recipient
(c)	AB Group	(iii)	Resist Infections
(d)	Platelets	(iv)	Contraction of Heart
(e)	Systole	(v)	Gas transport

2)
RBC
3)
AB Group
4)
Platelets
5)
Systole

CBSE 11th Biology - Breathing and Exchange of Gases Book Back Questions - by Jyoti Hirani - Ghorakhal - Sep 10, 2019 - View & Read

1)
What is the residual volume of air in a normal human?
2)
Which of the following is the correct sum for total lung capacity?
3)
Which centre of the central nervous system is primarily responsible for regulation of respiration?
4)
What controls the respiratory rhythm in human beings?
5)
Give the name of some common respiratory disorders

CBSE 11th Biology - Digestion and Absorption Book Back Questions - by Jyoti Hirani - Ghorakhal - Sep 10, 2019 - View & Read

1)
Gastric juice contains
2)
Succus entericus is the name given to
3)
Bilirubin and biliverdin
4)
Hydrolysis of starch
5)
Digestion of fat

CBSE 11th Biology - Plant Growth and Development Book Back Questions - by Jyoti Hirani - Ghorakhal - Sep 09, 2019 - View & Read

1)
Mention the name of the internal factors that control development in plants.
2)
Name the plant in which dimorphic leaves are found.
3)
What happens if the meristematic cells ever cease to divide?
4)
A farmer is using a substance called 2,4-D in his field growing wheat crop. Mention the purpose of using this substance in the field
5)
A student cultures a callus from the tobacco pith in a sterilised minimal nutritive medium, but adds more cytokinins than auxins. What would develop first from the callus the shoot buds or the roots?

CBSE 11th Biology - Respiration in Plants Book Back Questions - by Jyoti Hirani - Ghorakhal - Sep 09, 2019 - View & Read

1)
How many NADH₂ molecules are produced from one molecule of acetyl Co-A in TCA cycle?
2)
Why oxygen is an ultimate acceptor of electrons in ETS?
3)
Mention the significance of F_o-F₁ combination in mitochondria.
4)
What are the products formed by the splitting of fructose-1, 6-bisphosphate?
5)
Where does the formation of acetyl Co-A take place in a cell?

CBSE 11th Biology - Photosynthesis in Higher Plants Book Back Questions - by Jyoti Hirani - Ghorakhal - Sep 09, 2019 - View & Read

1)
Give the name of the first stable intermediate compound formed after CO₂ absorption during C₃ pathway.
2)
Succulents are known to keep their stomata closed during the day to check the rate of transpiration.How do they meet their photosynthetic CO₂ requirements?
3)
Which range of wavelength(in nm) is called Photosynthetically Active Radiation (PAR)?
4)
Tomatoes, carrots and chillies are red in colour due to presence of one pigment. Name the pigment.It is a photosynthetic pigment?
5)
Which photosystem will work if only longer wavelengths of light are given to a plant ?

CBSE 11th Biology - Mineral Nutrition Book Back Questions - by Jyoti Hirani - Ghorakhal - Sep 09, 2019 - View & Read

1)
Name the best conductive tissue for mineral nutrients in plants.
2)
Give the main difference between leghaemolobin and haemoglobin
3)
Name two factors responsible for the formation of oxides of nitrogen in the atmosphere.
4)
List an example of one aerobic and one anerobic nitrogen-fixing bacteria.
5)
Why are the elements C,H,O and N called structural elements?

CBSE 11th Biology - Transport in Plants Book Back Questions - by Jyoti Hirani - Ghorakhal - Sep 09, 2019 - View & Read

1)
The plant cell cytoplasm is surrounded by both cell wall and cell membrane. The specificity of transport of substances are mostly across the cell membrane, because __________________.
2)
Should there be a long distance transport system in plants?Give reason.
3)
Identify the vascular tissue responsible for translocation of organic and inorganic substance from leaves to other parts of the plant.
4)
Root pressure cannot account for the translocation of water.True or false?Explain.
5)
When does wilting occur?

CBSE 11th Biology Unit 10 Cell Cycle and Cell Division Book Back Questions - by Jyoti Hirani - Ghorakhal - Sep 06, 2019 - View & Read

1)
Mention the duration of cell cycle in yeast.
2)
Name the substages of prophase of meiosis.
3)
What does a bivalent of meiosis-I consist of?
4)
The shortest phase of mitosis is anaphase. State whether this statement is true or false.
5)
In which stage of prophase-I of meiosis, homologous chromosomes lie side by side in pairs.

CBSE 11th Biology - Biomolecules Book Back Questions - by Jyoti Hirani - Ghorakhal - Sep 06, 2019 - View & Read

1)
Name of any two aromatic amino acids.
2)
Nucleotides with more than one phosphate group are called ______.
3)
Name two physical factors which can affect the enzyme activity
4)
Name one homopolysaccharide and one heteropolysaccharide.
5)
Name the polysaccharide which constitutes the exoskeleton of arthropods.

11th Standard CBSE Biology Unit 8 Cell: The Unit of Life Book Back Questions - by Jyoti Hirani - Ghorakhal - Sep 05, 2019 - View & Read

1)
Why mitochondrion and chloroplast are not considered in the endomembrane system?
2)
Which pigment is mainly responsible for the colour of the carrot?
3)
Given one difference between the characteristic feature of Gram positive and Gram negative bacteria.
4)
In which organelle the proteins required for functioning of the nucleus are formed.
5)
Which layer of cell envelope is sticky in nature? Also give another name for this layer.

11th Standard CBSE Biology Unit 7 Structural Organisation in Animals Book Back Questions - by Jyoti Hirani - Ghorakhal - Sep 05, 2019 - View & Read

1)
Name the type of young and mature cartilage cells
2)
Name the different cells junctions found in tissues.
3)
In which type of bone , bone marrow cavity is present ?
4)
What are the cellular components of haemoglobin?
5)
Plasma protein acts as acid-base buffer in the blood . Explain

11th Standard CBSE Biology Unit 6 Anatomy of Flowering Plants Book Back Questions - by Jyoti Hirani - Ghorakhal - Sep 04, 2019 - View & Read

1)
What is the composition of collenchyma cells ?
2)
How the vessel members in xylems are interconnected ?
3)
What is the other name of bulliform cells?
4)
What constitutes the cambium ring?
5)
Name two characteristic bands that are found in endodermis of dicot root.

11th Standard CBSE Biology Unit 5 Morphology of Flowering Plants Book Back Questions - by Jyoti Hirani - Ghorakhal - Sep 04, 2019 - View & Read

1)
The scutellum obeserved in a grain of wheat or maize is comparable to which part of the seed in other monocots.
2)
Why are velamen tissues present in epiphytic roots?
3)
A maize grain is not a seed.Explain
4)
What are the two layers of seed coat?
5)
Write the floral formula of family-Fabaceae and give its two examples.

11th Standard CBSE Biology Unit 4 Animal Kingdom Book Back Questions - by Jyoti Hirani - Ghorakhal - Sep 03, 2019 - View & Read

1)
In some animal groups, the body is found to be divided into compartments with at least some organs/organ repeated. Name this characteristic feature.
2)
Name two non-chordate phyla, where animals are radially symmetrical.
3)
What kind of body scales are present in bony
4)
What are coelomates? Give two examples.
5)
Which animals have notochord?

11th Standard CBSE Biology Unit 3 Plant Kingdom Book Back Questions - by Jyoti Hirani - Ghorakhal - Sep 03, 2019 - View & Read

1)
What are seed located in gymnosperm?
2)
What does natural system of classification indicates?
3)
How are plants placed in phylogenetic system of classification?
4)
Which unicellular plants are included in kingdom-plantae?
5)
How are algae classified in Whittaker's classification?

11th Standard CBSE Biology Unit 2 Biological Classification Book Back Questions - by Jyoti Hirani - Ghorakhal - Aug 31, 2019 - View & Read

1)
The two gametangia come in contact and fuse to form a zygote in which event? Give two examples.
2)
List the types of lichens.
3)
What is the body organisation in members of kingdom-Animalia?
4)
Name the infection agent that causes potato spindle tuber.
5)
In which kingdom of five kingdom classification, nuclear membrane is not present?

11th Standard CBSE Biology Unit 1 The Living World Book Back Questions - by Jyoti Hirani - Ghorakhal - Aug 30, 2019 - View & Read

1)
Why is it difficult to assign common names to all living organisms ?
2)
Name any two printed means of recording descriptions of a taxa, besides key.
3)
What does ICZN stand for?
4)
Which is the largest botanical garden in the world? Name a few well-known botanical gardens in India.
5)
How is key helpful in identification of living organisms?

11th Standard CBSE Biology Unit 9 Biomolecules One Mark Question and Answer - by Jyoti Hirani - Ghorakhal - Aug 29, 2019 - View & Read

1)
Which is the first step in analysis of biomolecules?
2)
Which of the following elements is highest in percentage composition in the human body?
3)
Amino acids are also known as: _____.
4)
Aromatic amino acids contain which reactive group?
5)
Which of the following is a fat?

11th Standard CBSE Biology Unit 8 Cell: The Unit of Life One Mark Question with Answer - by Jyoti Hirani - Ghorakhal - Aug 29, 2019 - View & Read

1)
Which of the following scientists proposed the cell theory?
2)
Which of the following is not part of endomembrane system?
3)
Which of the following is part of endomembrane system?
4)
Which of the following organisms have a prokaryotic cell?
5)
Which organelle is not found in plant cells?

11th Standard CBSE Biology Unit 7 Structural Organisation in Animals One Mark Question and Answer - by Jyoti Hirani - Ghorakhal - Aug 29, 2019 - View & Read

1)
Which of the following is the correct definition of tissue?
2)
Squamous epithelium are found in which of the following places?
3)
Which place will have cuboidal epithelium?
4)
Columnar epithelium is found in the lining of which organ?
5)
Which of the following organs will not have ciliated epithelium?

11th Standard CBSE Biology Unit 6 Anatomy of Flowering Plants One Mark Question and Answer - by Jyoti Hirani - Ghorakhal - Aug 28, 2019 - View & Read

1)
What is the name of modified root in turnip?
2)
Which of the following shows modification of stem for food storage?
3)
Onion shows modification of which part of plant?
4)
What is the name of the whorl containing colourful parts of flower?
5)
Starting from periphery and going towards centre which is the correct sequence of different whorls of a flower?

11th Standard CBSE Biology Unit 5 Morphology of Flowering Plants One Mark Question and Answer - by Jyoti Hirani - Ghorakhal - Aug 28, 2019 - View & Read

1)
Apical meristem is found at which of the following organs in plant?
2)
Which is the position of intercalary meristem?
3)
Stomata is found in which tissue system?
4)
What happens when stomata opens?
5)
Open bundle is found in which of the following?

11th CBSE Biology Unit 4 Animal Kingdom One Mark Question with Answer Key - by Jyoti Hirani - Ghorakhal - Aug 27, 2019 - View & Read

1)
Water vascular system is the characteristic of which group of the following:
2)
In which of the following organisms sexes are not separate?
3)
Which of the following organisms is having a two-chambered heart?
4)
On the basis of which character it can be said that bats do not belong to Aves?
5)
How many chambers are there in the heart of a crocodile?

11th CBSE Biology Unit 3 Plant Kingdom One Mark Question Paper with Answer Key - by Jyoti Hirani - Ghorakhal - Aug 26, 2019 - View & Read

1)
Which of the following shows no segregation of plant parts?
2)
Which of the following is not among cryptogams?
3)
Which of the following play an important role in soil formation?
4)
Which of the following division contains the largest number of plant species?
5)
Diploid sporophyte is dominant phase in the life cycle of which plant?

11th Standard CBSE Biology Unit 2 Biological Classification One Mark Question Paper - by Jyoti Hirani - Ghorakhal - Aug 24, 2019 - View & Read

1)
Which is the correct word for relationship between algae and fungi in lichens?
2)
Which of the following organisms is a good indicator of pollution in an environment?
3)
Which is the most acceptable system of biological classification?
4)
How the Aristotle divided animals into two groups?

11th CBSE Biology The Living World One Mark Question Paper - by Jyoti Hirani - Ghorakhal - Aug 23, 2019 - View & Read

1)
Which of the following scientists started the practice of using biological names?
2)
What is the full form of ICBN?
3)
Why are biological names written in Italics?
4)
Which of the following can also be made in your home?
5)
Which of the following characteristic of living beings, can also be observed in some non-livings?

11th CBSE Biology Transport in Plants Model Question Paper - by Jyoti Hirani - Ghorakhal - Aug 20, 2019 - View & Read

1)
Substances which need facilitated diffusion have which kind of moiety?
2)
Which of the following shows the correct relation at atmospheric pressure?
3)
When a seed is soaked overnight in water, what happens to its cells?
4)
When rajma seeds are soaked in water overnight, they swell. What gives the explanation for this?
5)
Which of the following is a characteristic of mass flow movement?

11th CBSE Biology Cell Cycle and Cell Division Model Question Paper - by Jyoti Hirani - Ghorakhal - Aug 19, 2019 - View & Read

1)
Which of the following cells usually do not undergo cell division?
2)
During which stage the cell organelles reappear in cell division?
3)
Which of the following is the longest stage during meiosis?
4)
During which stage of meiosis the recombination of genes takes place?
5)
Which of the following enzymes is responsible for recombination of genes?

11th Standard CBSE Biology Bio-molecules Model Question Paper - by Jyoti Hirani - Ghorakhal - Aug 13, 2019 - View & Read

1)
Which is the first step in analysis of biomolecules?
2)
Primary metabolites are always found in animal cells. Which of the following is not an example of primary metabolite?
3)
The fact that all biomolecules undergo turnover is known as _____.
4)
Which of the following defines the living state?
5)
Which of the following is not a macromolecule?

11th Standard CBSE Biology Cell : The Unit of Life Model Question Paper - by Jyoti Hirani - Ghorakhal - Aug 05, 2019 - View & Read

1)
Which organelle is not found in plant cells?
2)
Protein synthesis takes place in which cell organelle?
3)
Which of the following plastids stores proteins?
4)
A ribosome is 80S. In this statement what does the letter 'S' signify?
5)
What is the basis of classification of chromosomes?

11th Standard CBSE Unit 7 Structural Organisation in Animals Model Question Paper - by Jyoti Hirani - Ghorakhal - Aug 03, 2019 - View & Read

1)
Squamous epithelium are found in which of the following places?
2)
What is the name of muscle fibres?
3)
Frog shows which kind of excretion?

11th CBSE Biology Unit 6 Anatomy of Flowering Plants Sample Question Paper - by Jyoti Hirani - Ghorakhal - Jul 31, 2019 - View & Read

1)
What is the function of adventitious roots?
2)
What is the name of modified root in turnip?
3)
Which of the following shows modification of stem for food storage?
4)
What is the name of the whorl containing colourful parts of flower?
5)
Starting from periphery and going towards centre which is the correct sequence of different whorls of a flower?

11th CBSE Biology Unit 5 Morphology of Flowering Plants Important Question Paper - by Jyoti Hirani - Ghorakhal - Jul 30, 2019 - View & Read

1)
Apical meristem is found at which of the following organs in plant?
2)
Which of the following is a dead tissue?
3)
Open bundle is found in which of the following?
4)
What is the role of the guard cells?

11th Standard CBSE Biology Unit 4 Animal Kingdom Important Question Paper - by Jyoti Hirani - Ghorakhal - Jul 27, 2019 - View & Read

1)
Which of the following organisms is having a two-chambered heart?
2)
On the basis of which character it can be said that bats do not belong to Aves?
3)
How many chambers are there in the heart of a crocodile?
4)
Which type of excretion is present in fishes?
5)
Urecotelic excretion is found in which of the following pairs of animals?

11th Standard CBSE Biology Unit 3 Plant Kingdom Important Question Paper - by Jyoti Hirani - Ghorakhal - Jul 26, 2019 - View & Read

1)
Which of the following shows no segregation of plant parts?
2)
Which of the following is not among cryptogams?
3)
Which of the following play an important role in soil formation?
4)
Which of the following division contains the largest number of plant species?
5)
Which of the following is used in making litmus solution?

11th CBSE Biology Unit 2 Biological Classification Important Question Paper - by Jyoti Hirani - Ghorakhal - Jul 25, 2019 - View & Read

1)
Which is the correct word for relationship between algae and fungi in lichens?
2)
Which of the following organisms is a good indicator of pollution in an environment?
3)
Which is the most acceptable system of biological classification?
4)
How the Aristotle divided animals into two groups?

11th CBSE Biology Unit 1 The Living World Important Question Paper - by Jyoti Hirani - Ghorakhal - Jul 24, 2019 - View & Read

1)
Which of the following scientists started the practice of using biological names?
2)
What is the full form of ICBN?
3)
Which is the topmost taxa in zoology?
4)
Which the topmost taxa in Botany?
5)
Why are biological names written in Italics?

12th Standard stateboard question papers & Study material

தமிழ் Subjects

Biology

Computer Applications

Computer Science

Business Maths and Statistics

Commerce

Economics

Maths

Chemistry

Physics

Computer Technology

History

Accountancy

Tamil

English Subjects

Maths

Chemistry

Physics

Biology

Computer Science

Business Maths and Statistics

Economics

Commerce

Accountancy

History

Computer Applications

Computer Technology

English

11th Standard stateboard question papers & Study material

தமிழ் Subjects

Maths

Biology

உயிரியல் - தாவரவியல்

Economics

Physics

Chemistry

History

Business Maths and Statistics

Computer Science

Accountancy

Commerce

Computer Applications

Computer Technology

Tamil

English Subjects

Maths

Commerce

Economics

Biology

Business Maths and Statistics

Accountancy

Computer Science

Physics

Chemistry

Computer Applications

History

Computer Technology

Tamil

English

9th Standard stateboard question papers & Study material

தமிழ் Subjects

English Subjects

Maths

Science

Social Science

Maths

Science

Social Science

6th Standard stateboard question papers & Study material

தமிழ் Subjects

Maths

Science

Social Science

English Subjects

Maths

Science

Social Science

10th Standard stateboard question papers & Study material

தமிழ் Subjects