A recessive mutant is one which is

(1) not expressed

(2) rarely expressed

(3) expressed only in homozygous and hemizygous state

(4) expressed only in heterozygous state

If the total amount of adenine and thymine in a double-stranded DNA is 60%, the amount of guanine in this DNA will be

(1) 15%

(2) 20%

(3) 30%

(4) 40%

If T = 40%, C = 10% then G = ? in a pollen cell

(1) 40%

(2) 10%

(3) 91%

(4) 20%

Translocase is an enzyme required for

(1) DNA replication

(2) RNA synthesis

(3) initiation of protein synthesis

(4) protein synthesis chain elongation

Centre of DNA Fingerprinting and Diagnostics (CDFD) is located at

(1) Delhi

(2) Chennai

(3) Kolkata

(4) Hyderabad

In a bacterium, the amount of adenine was found to be 18 per cent. Suggest the cytosine base composition from the following

(1) 64%

(2) 36%

(3) 32%

(4) 18%

In which of the following combinations, the compounds in ascending order based on their molecular weights are arranged?

(1) DNA, RNA, AMP, ADP, ATP

(2) DNA, RNA, ATP, ADP, AMP

(3) AMP, ADP, ATP, RNA, DNA

(4) AMP, ATP, ADP, DNA, RNA

If a segment of an mRNA molecule has the sequence 5’ GUACCGAUCG 3’, which of the following could have been the template DNA molecule?

(1) 3’ GCUAGCCAUG 5’

(2) 3’ GUACCGAUCG 5’

(3) 3’ CATGGCTAGC 5’

(4) 3’ CGATCGGTAC 5’

In prokaryotes, the process of replication is catalysed by the following enzymes. Identify which of the enzymes is best coordinate with the role.

hn-RNA undergoes two additional processing. Out of which, in one of them an unusual nucleotide (methyl guanosine triphosphate) is added to the 5’-end of hnRNA. This is known as

(1) capping

(2) tailing

(3) splicing

(4) termination