Questions and answers for exam Preparation

MCQs

Total Questions : 282 | Page 21 of 29 pages

Question 201. A structure that has hydrogen bonds between polypeptide chains arranged side by side is

Primary structure
α-helix
β-pleated sheets
Tertiary structure

Discuss Question

Answer: Option C. -> β-pleated sheets
Answer: (c).β-pleated sheets

Question 202. Which of the following is not true about secondary protein structure?

The hydrophilic/hydrophobic character of amino acid residues is important to secondary structure.
The ability of peptide bonds to form intramolecular hydrogen bonds is important to secondary structure.
The alpha helix, beta pleated sheet and beta turns are examples of protein secondary structure.
The steric influence of amino acid residues is important to secondary structure.

Discuss Question

Answer: Option A. -> The hydrophilic/hydrophobic character of amino acid residues is important to secondary structure.
Answer: (a).The hydrophilic/hydrophobic character of amino acid residues is important to secondary structure.

Question 203. Which of the following are important for white blood cell recognition?

Glycosamineglycans
Proteoglycans
Gycoproteins
Glycolipids

Discuss Question

Answer: Option C. -> Gycoproteins
Answer: (c).Gycoproteins

Question 204. Each tRNA molecule has a cloverleaf secondary structure consisting of

three stem loops
two stem loops
four stem loops
either (a) or (b)

Discuss Question

Answer: Option A. -> three stem loops
Answer: (a).three stem loops

Question 205. In both eukaryotes and prokaryotes, a promoter region that is rich in AT bases is called as

CATT
Shine Dalgarno region
TATA box
SV40 region

Discuss Question

Answer: Option C. -> TATA box
Answer: (c).TATA box

Question 206. What is a promoter?

A specific sequence of DNA to which a catabolic repressor binds
A specific sequence of DNA to which RNA polymerase binds
A specific DNA sequence to which a restriction endonuclease binds
None of the above

Discuss Question

Answer: Option B. -> A specific sequence of DNA to which RNA polymerase binds
Answer: (b).A specific sequence of DNA to which RNA polymerase binds

Question 207. The function of the sigma factor of RNA polymerase is to