Home
Current Affairs January 2024

What is the correct answer?

4

Reverse transcription was discovered by

A. Watson

B. Crick

C. Temin

D. Porter

Correct Answer :

C. Temin


Related Questions

What is the correct answer?

4

Chromosomes exhibit minimum coiling during

A. prophase

B. metaphase

C. interphase

D. telophase

What is the correct answer?

4

Colour blindness is caused due to

A. deficiency of vitamic C

B. sex-linked abnormality

C. absence of rods in retina

D. absence of visual purple in retina

What is the correct answer?

4

DNA duplication occurs in

A. meiosis only

B. meiosis II and mitosis

C. mitosis only

D. meiosis I and mitosis

What is the correct answer?

4

Reverse transcription was discovered by

A. Watson

B. Crick

C. Temin

D. Porter

What is the correct answer?

4

Exhibition of superiority by a hybrid over both of its parents is called

A. heterosis

B. hybridization

C. hypostasis

D. dominance

What is the correct answer?

4

The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by

A. fission

B. budding

C. asexual means

D. sexual means

What is the correct answer?

4

The nuclear membrane completely disappears during

A. late prophase

B. early metaphase

C. metaphase

D. interphase

What is the correct answer?

4

The chromosomal theroy of heredity implies that

A. chromosomes are composed of DNA and protein

B. genes are composed of chromosomes

C. organism cannot live withoutchromosomes

D. genes are located on the chromosomes and are transmitted to the next generation through them.

What is the correct answer?

4

Linked genes may be separated by the process of

A. gene mutation

B. segregation

C. crossing over

D. polyploidy

What is the correct answer?

4

Diakinesis is characterised by

A. crossing over

B. synapse

C. chiasmata

D. terminalization

What is the correct answer?

4

Linkage is

A. directly related to crossing over

B. same as translocation

C. inversely related to crossing over

D. opposite to segregation

What is the correct answer?

4

 A person meets with an accident and great loss of blood has occurred. There is no time to analyse his blood group. It is safe to transfuse blood of

A. AB, RH+

B. AB, RH-

C. O, RH-

D. O, RH+

What is the correct answer?

4

The term 'meiosis' was coined bv

A. Herting and Van Beneden

B. Sutton and Boveri

C. Hofmeister and Waldeyer

D. Farmer and Moore

What is the correct answer?

4

The science dealing with study of inheritance and variation is

A. Genetics

B. Evolution

C. Morphology

D. Cytology

What is the correct answer?

4

The number of characters investigated by Mendel was

A. four

B. seven

C. six

D. one

What is the correct answer?

4

How many meiosis will be required to produce 102 pollen-grains ?

A. 25

B. 25.6

C. 26

D. 26.5

What is the correct answer?

4

Albinism in com plants is best described as

A. lethal

B. sex-linked

C. inbred

D. dominance

What is the correct answer?

4

Lethal genes are those which

A. cause the death of the organism in which they are present

B. cause the death of the homozygous infant being formed

C. cause the death of heterozygous infant being formed

D. all of the above

What is the correct answer?

4

A codon is a sequence of 3 nucleolides on

A. t-RNA

B. m-RNA

C. s-RNA

D. hn-RNA

What is the correct answer?

4

The genetic constitution of an organism is known as

A. Genome

B. Genepool

C. Genotype

D. Phenotype

What is the correct answer?

4

The first person to induce mutations was

A. Hugo de Vries

B. T.H. Morgan

C. Sturtevant

D. H.J. Muller

What is the correct answer?

4

Transfer of a gene or genes through a virus is called

A. transformation

B. transduction

C. genetic engineering

D. sex-duction

What is the correct answer?

4

The best method to determine whether an individual is homozygous or heterozygous is

A. inbreeding

B. cross-breeding

C. back-crossing

D. self-fertilization

What is the correct answer?

4

 A chemical mutagen is

A. X-rays

B. UV-rays

C. β-rays

D. 5-Bromo-Uracil

What is the correct answer?

4

A child is bom with an extra chromosome in each of its cells. This is usually the result of

A. nondisjunction

B. crossing over

C. segregation

D. hybridization

What is the correct answer?

4

A functional unit of a gene which specifies synthesis of one poly-peptide is known as

A. clone

B. recon

C. cistron

D. codon

What is the correct answer?

4

When is the sex of an offspring decided

A. At ovulation

B. During meiosis

C. During cleavage

D. At fertilization

What is the correct answer?

4

Crossing over in meiosis occurs in

A. leptotene

B. pachytene

C. diplotene

D. diakinesis

What is the correct answer?

4

The scientists who rediscovered the Mendel's laws are

A. Mast and Pantin

B. Watson and Crick

C. Corren, Tschermark and Hugo de Vries

D. Khorana and Nirenberg

What is the correct answer?

4

Mutations which are not dominant are not lost by a gene pooL This is known as

A. Survival of the dominant

B. Survival of the recessive

C. Hardly-Weinberg law

D. None of these