7 Top NITROGEN METABOLISM Questions and Answers pdf

1. How many molecules of ATP are hydrolysed to form two molecule of ammonia?

A. 10
B. 5
C. 16
D. 15

Answer: C

2. The nitrogen atoms of urea produced in the urea cycle are derived from

A. nitrate
B. ammonia and aspartic acid
C. nitrite
D. ammonia

Answer: B

3. The products of urea cycle are

A. 1 molecule of urea, 1 molecule of ammonia, 1 molecule of ATP and 1 molecule of fumaric acid
B. 1 molecule of fumaric acid, 1 molecule of urea, 1 molecule of AMP, 2 molecules of ADP
C. 1 molecule of aspartic acid, 1 molecule of ammonia, 1 molecule of fumaric acid, 1 molecule of ATP
D. None of the above

Answer: B

4. Nitrate reduction can be carried out by

A. only microorganism
B. plant and microorganism
C. only plants
D. none of these

Answer: B

5. Which of the following is used as carbon atom source while producing urea in the urea cycle?

A. Arginine
B. Aspartic acid
C. Carbon dioxide
D. Glucose

Answer: C

NITROGEN METABOLISM Questions and Answers ::

6. Which of the following amino acid do not fall under the category of essential amino acid?

A. Histidine
B. Leucine
C. Glycine
D. Methionine

Answer: C

7. Urea cycle converts

A. ammonia into a less toxic form
B. ketoacids into amino acids
C. amino acids into ketoacids
D. none of these

Answer: A