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MCQs

Total Questions : 63 | Page 2 of 7 pages
Question 11. Before most molecules can enter the Krebs citric acid cycle, they must be converted to
  1.    NADH or FADH
  2.    citric acid
  3.    oxaloacetic acid
  4.    acetyl-CoA
 Discuss Question
Answer: Option D. -> acetyl-CoA
Question 12. In lactic acid fermentation, the final electron acceptor would be
  1.    fructose
  2.    acetyl-CoA
  3.    pyruvate
  4.    glucose
 Discuss Question
Answer: Option C. -> pyruvate
Question 13. Which of the following is accomplished in chemiosmosis?
  1.    The oxidation of CO2
  2.    The oxidation of ATP
  3.    The oxidation of water
  4.    The oxidation of NADH
 Discuss Question
Answer: Option D. -> The oxidation of NADH
Question 14. A yeast or fungal cell produces how many net ATP molecules per molecule of glucose when completely oxidized?
  1.    32
  2.    34
  3.    36
  4.    38
 Discuss Question
Answer: Option C. -> 36
Question 15. The amount of ATP that can be obtained by complete oxidation of a glucose by a bacterium is
  1.    none of these
  2.    exactly or approximately equal to by a yeast cell
  3.    greater than by a yeast cell
  4.    lesser than by a yeast cell
 Discuss Question
Answer: Option C. -> greater than by a yeast cell
Question 16. The amount of ATP produced by a cell from glucose when metabolizing it by fermentation means is
  1.    lesser than by aerobic metabolism
  2.    none of these
  3.    exactly or approximately equal to by aerobic metabolism
  4.    greater than by aerobic metabolism
 Discuss Question
Answer: Option A. -> lesser than by aerobic metabolism
Question 17. Most bacterial fermentations yield how many net ATP molecules per molecule of glucose?
  1.    2
  2.    1
  3.    4
  4.    6
 Discuss Question
Answer: Option A. -> 2
Question 18. Which one of the following is produced in the greatest numbers during one turn of the Krebs cycle?
  1.    NADH
  2.    FADH2
  3.    ATP
  4.    Acetyl-CoA
 Discuss Question
Answer: Option A. -> NADH
Question 19. Aerobic respiration differs from anaerobic respiration in which of the following respects?
  1.    Aerobic respiration produces less ATP
  2.    The final electron acceptors are different
  3.    Anaerobic respiration is glycolysis
  4.    Aerobic respiration requires the electron transport chain
 Discuss Question
Answer: Option B. -> The final electron acceptors are different
Question 20. How many oxygen molecules are required in the fermentation of one molecule of glucose to ethanol and CO2?
  1.    36
  2.    0 
  3.    1
  4.    2
 Discuss Question
Answer: Option B. ->

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