Protein and Nuclei Acids MCQs

Question 1

The ability of proteins to absorb ultraviolet light is predominantly due to the presence of

Accepted Answer

Tryptophan

Answer

Disulphide bond

Answer

Hydrophobic amino acids

Answer

Hydrophilic amino acids

Question 2

Which of the following statement about the ribosome complex is correct?

Accepted Answer

All of the above

Answer

Small subunit binds an mRNA and large subunit joint with the mRNA/small subunit complex to form a complete ribosome

Answer

The large ribosomal subunit has a P site (peptidyl site) that holds the growing polypeptide chain and an A site (aminoacyl site) that binds the next amino acid to be added to the growing polypeptide chain

Answer

The additon of new amino acid in the A site to the growing polypeptide chain is catalyzed by one of the enzymes that form the large ribosomal subunit

Question 3

DNA polymerase involved in general DNA replication in eukaryotes is

Accepted Answer

A and B both

Answer

α

Answer

β

Answer

γ

Question 4

The length of DNA present in nucleosome core particle

Accepted Answer

146 bp

Answer

165 bp

Answer

200 bp

Answer

None of the above

Question 5

The reduction of nitrate to nitrite in the cytosol is catalyzed by the enzyme

Accepted Answer

Nitrate reductase

Answer

Nitrite reductase

Answer

Glutamine synthetase

Answer

Glutamate dehydrogenase

Question 6

The term "gene" was coined by

Accepted Answer

Wilhelm Johannensen

Answer

Morgan

Answer

Benzer

Answer

William Bateson

Question 7

In clover leaf model of $$tRNA$$ , $$\psi $$ present in $$T\psi C$$ loop represents

Accepted Answer

Pseudouridine or pseudouracil

Answer

Dihydrouridine or dihydrouracil (D-loop)

Answer

Both A and B

Answer

Uracil

Question 8

Which of the following steps are involved in the process of template preparation during DNA replication?

Accepted Answer

All of the above

Answer

Unwinding of double helix

Answer

Breakage of hydrogen bonds

Answer

Coating of single stranded template to prevent them from reannealing

Question 9

Because of base interactions, the outside of the helix is not smooth and it is termed as

Accepted Answer

A and B both

Answer

Major groove

Answer

Minor groove

Answer

None of the above