Biochemistry Questions and Answers Part-15

1. Ninhydrin with evolution of CO2 forms a blue complex with
a) Peptide bond
b) α-Amino acids
c) Serotonin
d) Histamine

Answer: b

2. The most of the ultraviolet absorption of proteins above 240 nm is due to their content of
a) Tryptophan
b) Aspartate
c) Glutamate
d) Alanine

Answer: a

3. Which of the following is a dipeptide?
a) Anserine
b) Glutathione
c) Glucagon
d) β -Lipoprotein

Answer: a

4. Which of the following is a tripeptide?
a) Anserine
b) Oxytocin
c) Glutathione
d) Kallidin

Answer: c

5. A peptide which acts as potent smooth muscle hypotensive agent is
a) Glutathione
b) Bradykinin
c) Tryocidine
d) Gramicidin-s

Answer: b

6. A tripeptide functioning as an important reducing agent in the tissues is
a) Bradykinin
b) Kallidin
c) Tyrocidin
d) Glutathione

Answer: d

7. An example of metalloprotein is
a) Casein
b) Ceruloplasmin
c) Gelatin
d) Salmine

Answer: b

8. Carbonic anhydrase is an example of
a) Lipoprotein
b) Phosphoprotein
c) Metalloprotein
d) Chromoprotein

Answer: c

9. An example of chromoprotein is
a) Hemoglobin
b) Sturine
c) Nuclein
d) Gliadin

Answer: a

10. An example of scleroprotein is
a) Zein
b) Keratin
c) Glutenin
d) Ovoglobulin

Answer: b