In each of the following questions there are two statements. One is assertion (A) and other is reasoning (R). Mark the correct answer as
Assertion (A): Offsprings produced by asexual reproduction are genetically identical to the parent.
Reason(R): Asexual reproduction involves only mitosis and no meiosis.
Codes:
A. If both A and R are true and R is correct explanation for A
B. If both A and R are true but R is not the correct explanation for A
C. If A is true but R is false
D. If both A and R are false.

(a)

both A and R are true and R is correct explanation for A

(b)

If both A and R are true but R is not the correct explanation for A

(c)

If A is true but R is false

(d)

If both A and R are false.

Assertion(A): Ovulation is the release of ovum from the Graafian follicle.
Reason(R): It occurs during the follicular phase of the menstrual cycle.
Codes:
(a) A and R are true, R is the correct explanation of A
(b) A and R are true, R is not the correct explanation of A
(c)  A is true, R is false
(d) Both A and R are false

(a)

A and R are true, R is the correct explanation of A

(b)

A and R are true, R is not the correct explanation of A

(c)

A is true, R is false

(d)

Both A and R are false

The approach which does not give the defined action of contraceptive is

(a)

Hormonal contraceptive-Prevents entry of sperms, prevent ovulation and fertilization

(b)

Vasectomy-Prevents spermatogenesis

(c)

Barrier method-Prevents fertilization

(d)

Intra uterine device-Increases phagocytosis of sperms, suppresses sperm motility and fertilizing capacity of sperms

Which of the following is true about Rh factor in the offspring of a parental combination DdxDd (both Rh positive)?

(a)

All will be Rh-positive

(b)

Half will be Rh positive

(c)

About ¾ will be Rh negative

(d)

About one fourth will be Rh negative

Who is the founder of Modern Eugenics movement?

(a)

Mendel

(b)

Darwin

(c)

Francis Galton

(d)

Karl pearson

E. coli cell grown on ¹⁵N medium are transferred to ¹⁴N medium and allowed to grow for two generations. DNA extracted from these cells is ultracentrifuged in a cesium chloride density gradient. What density distribution of DNA would you expect in this experiment?

(a)

One high and one low density band

(b)

One intermediate density band.

(c)

One high and one intermediate density band.

(d)

One low and one intermediate density band

The wings of birds and butterflies is an example of

(a)

Adaptive radiation

(b)

convergent evolution

(c)

divergent evolution

(d)

variation

According to Darwin, the organic evolution is due to

(a)

Intraspecific competition

(b)

Interspecific competition

(c)

Competition within closely related species.

(d)

Reduced feeding efficiency in one species due to the presence of interfering species.

Allergy involves

(a)

IgE

(b)

IgG

(c)

lgA

(d)

IgM

CO₂ is not released during

(a)

Alcoholic fermentation

(b)

Lactate fermentation

(c)

Aerobic respiration in animals

(d)

Aerobic respiration in plants

Transgenic animals are those which have

(a)

Foreign DNA in some of their cells

(b)

Foreign DNA in all their cells

(c)

Foreign RNA in some of their cells

(d)

Foreign RNA in all their cells

Which of the following is correct for r-selected species

(a)

Large number of progeny with small size

(b)

large number of progeny with large size

(c)

small number of progeny with small size

(d)

small number of progeny with large size

Which of the following forests is known as the lungs of the planet earth?

(a)

Tundra forest

(b)

Rain for forest of north east India

(c)

Taiga forest

(d)

Amazon rain forest

The Ozone Day is observed every year on September 16 as on this day in 1987 the ___________was signed for launching efforts to arrest the depletion of the fragile ozone layer in the stratosphere that prevents the harmful ultra-violet rays of the sun from reaching the earth. Fill the correct word in blank.

(a)

Montreal Protocol

(b)

Geneva Protocol

(c)

Kyoto Protocol

(d)

Nagoya Protocol

Which of the following represent megagametophyte?

(a)

Ovule

(b)

Embryo sac

(c)

Nucellus

(d)

Endosperm

Coleorhiza is found in ______.

(a)

Paddy

(b)

Bean

(c)

Pea

(d)

Tridax

The genotype of a plant showing the dominant phenotype can be determined by _____.

(a)

Back cross

(b)

Test cross

(c)

Dihybrid cross

(d)

Pedigree analysis

Select the period for Mendel’s hybridization experiments.

(a)

1856 - 1863

(b)

1850 - 1870

(c)

1857 - 1869

(d)

1870 - 1877

The point mutation sequence for transition, transition, transversion and transversion in DNA are ______.

(a)

A to T, T to A, C to G and G to C

(b)

A to G, C to T, C to G and T to A

(c)

C to G, A to G, T to A and G to A

(d)

G to C, A to T, T to A and C to G

Which one of the following is not correct statement

(a)

Ti plasmid causes the bunchy top disease

(b)

Multiple cloning site is known as Polylinker

(c)

Non viral method transfection of Nucleic acid in cell

(d)

Polylactic acid is a kind of biodegradable and bioactive thermoplastic.

The time duration for sterilization process by using autoclave is ______ minutes and the temperature is ______.

(a)

10 to 30 minutes and 125° C

(b)

15 to 30 minutes and 121° C

(c)

15 to 20 minutes and 125° C

(d)

10 to 20 minutes and 121° C

Read the given statements and select the correct option.
i) Hydrophytes possess aerenchyma to support themselves in water.
ii) Seeds of Viscum are positively photoblastic as they germinate only in presence of light.
iii) Hygroscopic water is the only soil water available to roots of plant growing in soil as it is present inside the micropores.
iv) High temperature reduces use of water and solute absorption by roots

(a)

i, ii, and iii only

(b)

ii, iii and iv

(c)

ii and iii only

(d)

i and ii only

A free living nitrogen fixing cyanobacterium which can also form symbiotic association with the water fern Azolla ______.

(a)

Nostoc

(b)

Anabaena

(c)

chlorella

(d)

Rhizobium

Which one is in descending order of a food chain?

(a)

Producers \(\rightarrow \) Secondary consumers \(\rightarrow \) Primary consumers \(\rightarrow \) Tertiary consumers

(b)

Tertiary consumers \(\rightarrow \) Primary consumers \(\rightarrow \)Secondary consumers \(\rightarrow \) Producers

(c)

Tertiary consumers \(\rightarrow \) Secondary consumers \(\rightarrow \) Primary consumers \(\rightarrow \) Producers

(d)

Tertiary consumers \(\rightarrow \) Producers \(\rightarrow \) Primary consumers \(\rightarrow \) Secondary consumers

One green house gas contributes 14% of total global warming and another contributes 6%. These are respectively identified as _____.

(a)

N₂O and CO₂

(b)

CFCs and N₂O

(c)

CH₄ and CO₂

(d)

CH₄ and CFCS

Jaya and Ratna are the semi dwarf varieties of ______.

(a)

wheat

(b)

rice

(c)

cowpea

(d)

mustard

The active principle trans-tetra hydro canabiol is present in ______.

(a)

Opium

(b)

Curcuma

(c)

Marijuana 

(d)

Andrographis

Raja is injured and got swelling. The swelling is due to the infection of tissue is an example of

(a)

Mechanical barrier

(b)

Physiological barrier

(c)

Phagocytosis

(d)

Inflammation