Biochemistry Questions and Answers Part-14

1. An example of polar amino acid is
a) Alanine
b) Leucine
c) Arginine
d) Valine

Answer: c

2. The amino acid with a nonpolar side chain is
a) Serine
b) Valine
c) Asparagine
d) Threonine

Answer: b

3. A ketogenic amino acid is
a) Valine
b) Cysteine
c) Leucine
d) Threonine

Answer: c

4. An amino acid that does not form an α helix is
a) Valine
b) Proline
c) Tyrosine
d) Tryptophan

Answer: b

5. An amino acid not found in proteins is
a) β-Alanine
b) Proline
c) Lysine
d) Histidine

Answer: a

6. In mammalian tissues serine can be a biosynthetic precursor of
a) Methionine
b) Glycine
c) Tryptophan
d) Phenylalanine

Answer: b

7. A vasodilating compound is produced by the decarboxylation of the amino acid:
a) Arginine
b) Aspartic acid
c) Glutamine
d) Histidine

Answer: d

8. Biuret reaction is specific for
a) –CONH-linkages
b) –CSNH2 group
c) –(NH)NH2 group
d) All of these

Answer: a

9. Sakaguchi’s reaction is specific for
a) Tyrosine
b) Proline
c) Arginine
d) Cysteine

Answer: c

10. Million-Nasse’s reaction is specific for the amino acid:
a) Tryptophan
b) Tyrosine
c) Phenylalanine
d) Arginine

Answer: b