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) : In bee society, all the members are diploid except drones.
Reason (R) : Drones are produced by parthenogenesis
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)

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

The foetal membrane that forms the basis of the umbilical cord is _____.

(a)

Allantois

(b)

Amnion

(c)

Chorion

(d)

Yolk sac

Identify the correct statements from the following.

(a)

Chlamydiasis is a viral disease

(b)

Gonorrhoea is caused by a spirochaete bacterium, Treponema palladium

(c)

The incubation period for syphilis is 2 to 14 days in males and 7 to 21 days in females

(d)

Both syphilis and gonorrhoea are easily cured with antibiotics

Which of the following is not correct?

(a)

Three or more alleles of a trait in the population are called multiple alleles

(b)

A normal gene undergoes mutations to form many alleles

(c)

Multiple alleles map at different loci of a chromosome

(d)

A diploid organism has only two alleles out of many in the population

Pataus syndrome is also referred to as ______.

(a)

13-Trisomy

(b)

18-Trisormy

(c)

21-Trisormy

(d)

None of these

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

Who proposed the Germplasm theory?

(a)

Darwin

(b)

August Weismann

(c)

Lamarck

(d)

Alfred Wallace

Which one of the following palindromic base sequence in DNA can be easily cut at about the middle by some particular restriction enzymes?

(a)

5' CGTTCG 3' 3' ATCGTA 5'

(b)

5'GATATG 3'  3' CTACTA 5'

(c)

5'GAATTC 3' 3' CTTAAG 5'

(d)

5'CACGTA 3' 3' CTCAGT 5'

Match the following :

1) Totipotency	A) Reversion of mature cells into meristerm
2) Dedifferentiation	B) Biochemical and structural changes of cells
3) Explant	C) Properties of living cells develops into entire plant
4) Differentiation	D) Selected plant tissue transferred to culture medium

(a)

1	2	3	4
C	A	D	B

(b)

1	2	3	4
A	C	B	D

(c)

1	2	3	4
B	A	D	C

(d)

1	2	3	4
D	B	C	A

A specific place in an ecosystem, where an organism lives and performs its functions is _____.

(a)

habitat

(b)

niche

(c)

landscape

(d)

biome