10th Standard Syllabus & Materials
10th Standard
Tamilnadu 10th Standard Social Science GEO - India - Population, Transport, Communication and Trade Important Questions And Answers Study Material - QB365 Set C
NEW10th Standard
Tamilnadu 10th Standard Social Science GEO - India - Population, Transport, Communication and Trade Important Questions And Answers Study Material - QB365 Set B
NEW10th Standard
Tamilnadu 10th Standard Social Science GEO - India - Population, Transport, Communication and Trade Important Questions And Answers Study Material - QB365 Set A
NEW10th Standard
Tamilnadu 10th Standard Social Science GEO - India - Resources and Industries Important Questions And Answers Study Material - QB365 Set C
NEW10th Standard
Tamilnadu 10th Standard Social Science GEO - India - Resources and Industries Important Questions And Answers Study Material - QB365 Set B
NEW10th Standard
Tamilnadu 10th Standard Social Science GEO - India - Resources and Industries Important Questions And Answers Study Material - QB365 Set A
Published on: 19/10/2025
Download Tamil Nadu 10th Standard Science question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Science Test
Multiple Choice Question
1.
Which is formed during anaerobic respiration
Carbohydrate
Ethyl alcohol
Acetyl CoA
Pyruvate
2.
The brain of leech lies above the
Mouth
Buccal Cavity
Pharynx
Crop
3.
During transpiration there is loss of
Carbon dioxide
Oxygen
Water
None of the above
4.
Which nervous band connects the two cerebral hemispheres of brain?
thalamus
hypothalamus
corpus callosum
pons
5.
Estrogen is secreted by
Anterior pituitary
Primary follicle
Graffian follicle
Graffian follicle
6.
ANSWER THE FOLLOWING
7.
What is collateral vascular bundle?
8.
How does leech respire?
9.
Which organ acts as suction pump in leech?
10.
Give the name of wheat variety having higher dietary fibre and protein.
11.
What is the hormone responsible for the secretion of milk in female after child birth?
ANSWER THE FOLLOWING
12.
Give an account on vascular bundle of dicot stem.
13.
What is cohesion?
14.
Differentiate between Voluntary and involuntary actions.
15.
Name three improved characteristics of wheat that helped India to achieve high productivity.
16.
What will you do to prevent leaf fall and fruit drop in plants? Support your answer with reason.
ANSWER THE FOLLOWING
17.
Differentiate the following
a) Monocot root and Dicot root
b) Aerobic and Anaerobic respiration
18.
With a neat labelled diagram explain the techniques involved in gene cloning.
Multiple Choice Question
1.
(b)
Ethyl alcohol
2.
(c)
Pharynx
3.
(c)
Water
4.
(c)
corpus callosum
5.
(c)
Graffian follicle
6.
(b)
ANSWER THE FOLLOWING
7.
When xylem lies towards the centre and phloem lies towards the periphery, it is called collateral vascular bundle.
8.
Respiration takes place through skin.
9.
Blood is sucked by muscular pharynx, which act as a suction pump.
10.
Atlas 66 is a protein rich wheat variety having higher dietary fibre and protein.
11.
Prolactin (PRL) is also called lactogenic hormone, initiates development of mammary glands during pregnancy and stimulates the production of milk after child birth.
ANSWER THE FOLLOWING
12.
(i) A large number of vascular bundles are present in dicot stem.
(ii) They are arranged in the form of a ring around the pith.
(iii) Vascular bundles are conjoint, collateral, endarch and open.
13.
The force of attraction between molecules of water is called cohesion.
14.
| S.No | Voluntary actions | Involuntary actions |
|---|---|---|
| i) | An action which is under conscious control. |
An action which is not under conscious control. |
| ii) | Voluntary action is controlled by the brain. | Involuntary action is controlled by the spinal cord. |
| iii) | All voluntary actions result in a muscular action. | Involuntary actions result in a muscular action (or) secretion from some gland. |
15.
Semi dwarf nature high yield, disease resistance, early maturity.
16.
Application of auxin on plants will prevent leaf fall and fruit drop in plants because Auxins prevent the formation of abscission layer.
ANSWER THE FOLLOWING
17.
a) Monocot root and dicot root
|
S.No |
Tissues |
Monocot Root |
Dicot Root |
|---|---|---|---|
| i | Number of Xylem | Polyarch | Tetrarch |
| ii | Cambium | Absent | Present (During secondary growth only) |
| iii | Secondary Growth | Absent | Present |
| iv | Pith | Present | Absent |
b) Aerobic respiration and anaerobic Respiration:
| Basis for Comparison |
Aerobic Respiration |
Anaerobic Respiration |
|---|---|---|
| It occurs in | The cytoplasm and mitochondria. | Cytoplasm only. |
| Final product | Carbon dioxide, water and energy |
Carbon dioxide, Lactic acid (animal cells), ethanol (plant cell) and energy |
| It requires | Oxygen and glucose to produce energy |
It does not require oxygen but uses glucose to Produce energy |
| Number of ATP released | 38 ATP. | 2 ATP. |
18.
Gene Cloning:
(i) The carbon copy of an individual is often called a clone. However, more appropriately, a clone means to make a genetically exact copy of an organism.
Techniques involved in gene cloning:
(i) In gene cloning, a gene or a piece of DNA fragment is inserted into a bacterial cell where DNA will be multiplied (copied) as the cell divides.
A brief outline of the basic steps involved in gene cloning are:
(i) Isolation of desired DNA fragment by using restriction enzyme
(ii) Insertion of the DNA fragment into a suitable vector (Plasmid) to make rDNA
(iii) Transfer of rDNA into bacterial host cell (Transformation)
(iv) Selection and multiplication of recombinant host cell to get a clone
(v) Expression of cloned gene in host cell.
(vi) Using this strategy several enzymes, hormones and vaccines can be produced.
10th Standard Syllabus & Materials
10th Standard
Tamilnadu 10th Standard Social Science GEO - Climate and Natural Vegetation of India Important Questions And Answers Study Material - QB365 Set C
NEW10th Standard
Tamilnadu 10th Standard Social Science GEO - Climate and Natural Vegetation of India Important Questions And Answers Study Material - QB365 Set B
NEW10th Standard
Tamilnadu 10th Standard Social Science GEO - Climate and Natural Vegetation of India Important Questions And Answers Study Material - QB365 Set A
NEW10th Standard
Tamilnadu 10th Standard Social Science GEO - India - Location, Relief and Drainage Important Questions And Answers Study Material - QB365 Set B
Tamilnadu Stateboard 10th Standard Subjects
Tamilnadu Stateboard Standards
