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MCQs

Total Questions : 16 | Page 1 of 2 pages
Question 1. How many molecules of ATP are hydrolysed to form two molecule of ammonia?
  1.    5
  2.    10
  3.    15
  4.    16
 Discuss Question
Answer: Option D. -> 16
Question 2. Which of the following is used as carbon atom source while producing urea in the urea cycle?
  1.    Arginine
  2.    Aspartic acid
  3.    Glucose
  4.    Carbon dioxide
 Discuss Question
Answer: Option D. -> Carbon dioxide
Question 3. The products of urea cycle are
  1.    None of these
  2.    1 molecule of urea, 1 molecule of ammonia, 1 molecule of ATP and 1 molecule of fumaric acid
  3.    1 molecule of aspartic acid, 1 molecule of ammonia, 1 molecule of fumaric acid, 1 molecule of ATP
  4.    1 molecule of fumaric acid, 1 molecule of urea, 1 molecule of AMP, 2 molecules of ADP
 Discuss Question
Answer: Option D. -> 1 molecule of fumaric acid, 1 molecule of urea, 1 molecule of AMP, 2 molecules of ADP
Question 4. The nitrogen atoms of urea produced in the urea cycle are derived from
  1.    ammonia
  2.    ammonia and aspartic acid
  3.    nitrate
  4.    nitrite
 Discuss Question
Answer: Option B. -> ammonia and aspartic acid
Question 5. Nitrate reduction can be carried out by
  1.    only microorganism
  2.    plant and microorganism
  3.    only plants
  4.    none of these
 Discuss Question
Answer: Option B. -> plant and microorganism
Question 6. Which of the following amino acid do not fall under the category of essential amino acid?
  1.    Leucine
  2.    Methionine
  3.    Histidine
  4.    Glycine
 Discuss Question
Answer: Option D. -> Glycine
Question 7. The inputs to one cycle of the urea cycle are
  1.    1 molecule of aspartic acid, 1 molecule of ammonia, 1 molecule of carbon dioxide, 3 molecules of ATP
  2.    1 molecule of fumaric acid, 1 molecule of urea, 3 molecules of AMP
  3.    None of these
  4.    1 molecule of urea, 1 molecule of ammonia, 3 molecules of ATP and 1 molecule of fumaric acid
 Discuss Question
Answer: Option A. -> 1 molecule of aspartic acid, 1 molecule of ammonia, 1 molecule of carbon dioxide, 3 molecules of ATP
Question 8. Urea cycle converts
  1.    ketoacids into amino acids
  2.    amino acids into ketoacids
  3.    none of these
  4.    ammonia into a less toxic form
 Discuss Question
Answer: Option D. -> ammonia into a less toxic form
Question 9.  How many molecules of ATP are hydrolysed to form two molecule of ammonia?
  1.    10
  2.    5
  3.    16
  4.    15
 Discuss Question
Answer: Option C. -> 16
Question 10.  The nitrogen atoms of urea produced in the urea cycle are derived from
  1.    nitrate
  2.    ammonia and aspartic acid
  3.    nitrite
  4.    ammonia
 Discuss Question
Answer: Option B. -> ammonia and aspartic acid

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