Nitrogen Metabolism problems
- 1. Which of the following amino acid do not fall under the category of essential amino acid?
Options- A. Histidine
- B. Leucine
- C. Glycine
- D. Methionine Discuss
Correct Answer: Glycine
- 2. The nitrogen atoms of urea produced in the urea cycle are derived from
Options- A. nitrate
- B. ammonia and aspartic acid
- C. nitrite
- D. ammonia Discuss
Correct Answer: ammonia and aspartic acid
- 3. Urea cycle converts
Options- A. ammonia into a less toxic form
- B. ketoacids into amino acids
- C. amino acids into ketoacids
- D. none of these Discuss
Correct Answer: ammonia into a less toxic form
- 4. Which of the following is used as carbon atom source while producing urea in the urea cycle?
Options- A. Arginine
- B. Aspartic acid
- C. Carbon dioxide
- D. Glucose Discuss
Correct Answer: Carbon dioxide
- 5. The inputs to one cycle of the urea cycle are
Options- A. 1 molecule of aspartic acid, 1 molecule of ammonia, 1 molecule of carbon dioxide, 3 molecules of ATP
- B. 1 molecule of urea, 1 molecule of ammonia, 3 molecules of ATP and 1 molecule of fumaric acid
- C. 1 molecule of fumaric acid, 1 molecule of urea, 3 molecules of AMP
- D. None of the above Discuss
Correct Answer: 1 molecule of aspartic acid, 1 molecule of ammonia, 1 molecule of carbon dioxide, 3 molecules of ATP
- 6. How many molecules of ATP are hydrolysed to form two molecule of ammonia?
Options- A. 10
- B. 5
- C. 16
- D. 15 Discuss
Correct Answer: 16
- 7. The products of urea cycle are
Options- 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 Discuss
Correct Answer: 1 molecule of fumaric acid, 1 molecule of urea, 1 molecule of AMP, 2 molecules of ADP
- 8. Nitrate reduction can be carried out by
Options- A. only microorganism
- B. plant and microorganism
- C. only plants
- D. none of these Discuss
Correct Answer: plant and microorganism
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