The sexual union of young individuals produced immediately after the division of the parent Cell is called _____

(a)

Paedogamy

(b)

hologamy

(c)

merogamy

(d)

isogamy

Which of the following types of asexual reproduction is noticed in Amoeba?

(a)

Sporulation

(b)

Encystment

(c)

Binary fission

(d)

All the above

The process which the sperm undergoes before penetrating the ovum is _____.

(a)

Spermiation

(b)

Cortical reaction

(c)

Spermiogenesis

(d)

Capacitation

______ is a hormone produced by sertoli cells.

(a)

Inhibin

(b)

Progesterone

(c)

Testosterone

(d)

Oestrogen

The hormone ____ brings about powerful contraction of uterine muscles during child birth.

(a)

Relaxin

(b)

Oestrogen

(c)

Progesterone

(d)

Oxytocin

Which of the following contributes to the seminal plasma?
(i) Cowper's gland
(ii) Seminal vesicles
(iii) Prostate gland
(iv) Bulbourethral gland

(a)

ii, iii and ii

(b)

i, ii, and iii

(c)

i, iii and iv

(d)

all the above

The type of antibodies present in colostrum.

(a)

Ig E

(b)

Ig M

(c)

Ig A

(d)

Ig B

______ is needed for normal functioning of reproductive structures

(a)

Vitamin A

(b)

Vitamin E

(c)

Vitamin B

(d)

Vitamin C

Usage of _____ greatly reduces the risk of STI.

(a)

IUDS

(b)

Latex Condoms

(c)

Saheli

(d)

Lippes loop

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

Scientists who contributed to karyotyping _______.

(a)

Tjio and Levan

(b)

John Cotto

(c)

Bridges

(d)

Wiener

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

Messelson and Stahl ___________.

(a)

proved that RNA is the genetic material

(b)

proved that protein synthesis is dependent on DNA

(c)

proved the semi conservative mode of DNA replication.

(d)

discovered enzymes involved in replication

Whose experiment finally provided convincing evidence that DNA is the genetic material?

(a)

Griffith experiment

(b)

Avery, Macleod and McCarty's experiment

(c)

Hershey-Chase experiment

(d)

Urey-Miller's experiment

The sequence of bases in coding strand of DNA is GAGTTAGCAGGC, then the sequence of codons in primary transcript is ___________

(a)

C U C A U A C G C C C G

(b)

C U C A A U C G U C C G

(c)

U C A G A U C U G C G C

(d)

U U C A A U C G U G C G

The wings of birds and butterflies is an example of

(a)

Adaptive radiation

(b)

convergent evolution

(c)

divergent evolution

(d)

variation

Which one of the following statement is correct?

(a)

stem cells are specialized cells

(b)

there is no evidence of the existence of gills during embryogenesis of mammals

(c)

all plant and animal cells are totipotent

(d)

Ontogeny repeats phylogeny

Paratope is an

(a)

Antibody binding site on variable regions

(b)

Antibody binding site on heavy regions

(c)

Antigen binding site on variable regions

(d)

Antigen binding site on heavy regions

ELISA is mainly used for

(a)

Detection of mutations

(b)

Detection of pathogens

(c)

Selecting animals having desired traits

(d)

Selecting plants having desired traits

Which one of the following are at high risk extinction due to habitat destruction?

(a)

Mammals

(b)

Birds

(c)

Amphibians

(d)

Echinoderms

Which of the following represent megagametophyte?

(a)

Ovule

(b)

Embryo sac

(c)

Nucellus

(d)

Endosperm

Fruit colour in squash is an example of ______.

(a)

Recessive epistasis

(b)

Dominant epistasis

(c)

Complementary genes

(d)

Inhibitory genes

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

Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancer?

(a)

Ammonia

(b)

Methane

(c)

Nitrous oxide

(d)

Ozone

Tectona grandis is coming under family _____.

(a)

Lamiaceae

(b)

Fabaceae

(c)

Dipterocaipaceae

(d)

Ebenaceae