ENZYMES Few Questions

1. The following is a group-specific enzyme:
A. Pepsin
B. Aminopeptidase
C. Phospholipase D
D. All of the above

Answer: D. All the above

2. The following is a substrate-specific enzyme:
A. Hexokinase
B. Thiokinase
C. Lactase
D. Aminopeptidase

Answer: C. Lactase

3. The following is not a substrate-specific enzyme:
A. Glucokinase
B. Fructokinase
C. Hexokinase
D. Phospofructokinase

Answer: C. Hexokinase

4. Chymotrypsin hydrolyses peptide bonds in which carboxyl group is contributed by:
A. Phenylalanine
B. Tyrosine
C. Tryptophan
D. Any of the above

Answer: D. Any of the above

5. Coenzymes combine with:
A. Proenzymes
B. Apoenzymes
C. Holoenzymes
D. Antienzymes

Answer: B. Apoenzymes

6. Coenzymes are required in the following reactions:
A. Oxidation-reduction
B. Transamination
C. Phosphorylation
D. All of the above

7. The following coenzyme takes part in hydrogen transfer reactions:
A. Tetrahydrofolate
B. Coenzyme A
C. Coenzyme Q
D. Biotin

Answer: C. Coenzyme Q

8. The following coenzyme does not take part in hydrogen transfer reactions:
A. FAD
B. NAD
C. NADP
D. Cobamides

Answer: D. Cobamides

9. The following coenzyme takes part in oxidation reduction reactions:
A. Pyridoxal phospate
B. Lipoic acid
C. Thiamin diphospate
D. None of the above

Answer: B. Lipoic acid

10. In conversion of glucose to glucose-6-phospate, the coenqyme is:
A. Mg++
B. ATP
C. Both of the above
D. Neither of the above

Answer: B. ATP