DNA,RNA and Protein Metabolism MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on DNA,RNA and Protein Metabolism, a fundamental topic in the field of Biochemistry. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our DNA,RNA and Protein Metabolism MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of DNA,RNA and Protein Metabolism mcq questions that explore various aspects of DNA,RNA and Protein Metabolism problems. Each MCQ is crafted to challenge your understanding of DNA,RNA and Protein Metabolism principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Biochemistry tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our DNA,RNA and Protein Metabolism MCQs are your pathway to success in mastering this essential Biochemistry topic.

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DNA,RNA and Protein Metabolism MCQs | Page 16 of 37

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Q151.
Two features of the tRNA molecule associated, in converting the triplet codon to an amino acid, are

a.

in the T Loop and D stem and loop

b.

in the anticodon loop and D stem loop

c.

in the anticodon loop and the 3' CCA end

d.

none of the above

Discuss
Answer: (c).in the anticodon loop and the 3' CCA end
Q152.
The direction of amino acid transfer to the growing polypeptide chain is

a.

from the A (aminoacyl tRNA site) site to the P (peptidyl tRNA site) site on the ribosome

b.

from the P site to the A site on the ribosome

c.

from the A site to the E (exit tRNA site) site on the ribosome

d.

from the P site to the E site on the ribosome

Discuss
Answer: (b).from the P site to the A site on the ribosome
Q153.
The pathway of a tRNA during polypeptide elongation on the ribosome is

a.

A site → P site → E site

b.

P site → entry site → exit site

c.

A site → P site → entry site

d.

P site → A site → E site

Discuss
Answer: (a).A site → P site → E site
Q154.
Which of the following has unusual bases?

a.

mRNA

b.

tRNA

c.

rRNA

d.

hnRNA

Discuss
Answer: (b).tRNA
Q155.
The site on a bacterial chromosome that marks the termination point for chromosome replication is called

a.

ter

b.

a stop codon.

c.

a stem-loop

d.

pau

Discuss
Answer: (a).ter
Q156.
Degenerated codon differs mostly in

a.

the identities of their second base

b.

the identities of their third base

c.

the wobble position

d.

both (b) and (c)

Discuss
Answer: (d).both (b) and (c)
Q157.
Which of the following is true about DNA polymerase?

a.

It can synthesize DNA in the 5’ to 3’ direction

b.

It can synthesize DNA in the 3’ to 5’ direction

c.

It can synthesize mRNA in the 3’ to 5’ direction

d.

It can synthesize mRNA in the 5’ to 3’ direction

Discuss
Answer: (a).It can synthesize DNA in the 5’ to 3’ direction
Q158.
The reaction in DNA replication catalyzed by DNA ligase is

a.

Addition of new nucleotides to the leading strand

b.

Addition of new nucleotide to the lagging strand

c.

Formation of a phosphodiester bond between the 3’-OH of one Okazaki fragment and the 5’-phosphate of the next on the lagging strand

d.

Base pairing of the template and the newly formed DNA strand

Discuss
Answer: (c).Formation of a phosphodiester bond between the 3’-OH of one Okazaki fragment and the 5’-phosphate of the next on the lagging strand
Q159.
Which of the following reactions is required for proofreading during DNA replication by DNA polymerase III?

a.

5’ to 3’ exonuclease activity

b.

3’ to 5’ exonuclease activity

c.

3’ to 5’ endonuclease activity

d.

5’ to 3’ endonuclease activity

Discuss
Answer: (b).3’ to 5’ exonuclease activity
Q160.
Which of the following enzymes remove supercoiling in replicating DNA ahead of the replication fork?

a.

DNA polymerases

b.

Helicases

c.

Primases

d.

Topoisomerases

Discuss
Answer: (d).Topoisomerases
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