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Nitrogen Metabolism (Biochemistry) Question and Answers-Page first

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

  • Options
  • A. 10
  • B. 5
  • C. 16
  • D. 15
  • Discuss
  • 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
  • 8. Nitrate reduction can be carried out by

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

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