Which enzymes/s will be produced in a cell in which there is a non-sense mutation in the lac Y gene?

(1) β-galactosidase

(2) Lactose permease

(3) Transacetylase

(4) Lactose permease and transacetylase

Removal of RNA polymerase III from nucleoplasm will affect the synthesis of

(1) tRNA

(2) hnRNA

(3) mRNA

(4) rRNA

PCR and Restriction Fragment Length Polymorphism are the methods for

1. study of enzymes

2. genetic transformation

3. DNA sequencing

4. genetic fingerprinting

Which one of the following is not a part of a transcription unit in DNA?

(1) The inducer

(2) A terminator

(3) A promoter

(4) The structural gene

If one strand of DNA has the nitrogenous base sequence as ATCTG, what would be the complementary RNA strand sequence?

(1) TTAGU

(2) UAGAC

(3) AACTG

(4) ATCGU

Removal of introns and joining of exons in a defined order during transcription is called

(1) looping

(2) inducing

(3) capping

(4) splicing

What are those structures that appear as ‘beads-on-string’ in the chromosomes when viewed under electron microscope?

(1) Nucleotides

(2) Nucleosomes

(3) Base pairs

(4) Genes

Select the two statements out of the four (A - D) given below about lac operon.

(A) Glucose or galactose may bind with the repressor and inactivate it

(B) In the absence of lactose, the repressor binds with the operator region

(C) The z-gene codes for permease

(D) This was elucidated by Francois Jacob and Jacques Monod

The correct statements are

1. (B) and (C)

2. (A) and (C)

3. (B) and (D)

4. (A) and (B)

The one aspect which is not a salient feature of genetic code, is its being

(1) degenerate

(2) ambiguous

(3) universal

(4) specific

Satellite DNA is useful tool in

(1) organ transplantation

(2) sex determination

(3) forensic science

(4) genetic engineering