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MCQs

Total Questions : 63 | Page 4 of 7 pages
Question 31.  How many molecules of carbon dioxide will be given off during ten turns of the Krebs cycle?
  1.    10
  2.    20
  3.    30
  4.    40
 Discuss Question
Answer: Option B. -> 20
Question 32.  In cellular metabolism, O2 is used
  1.    to provide electrons for photophosphorylation
  2.    in glycolysis
  3.    as a terminal electron acceptor
  4.    in the Krebs cycle
 Discuss Question
Answer: Option C. -> as a terminal electron acceptor
Question 33.  The final electron acceptor in the electron transport chain is
  1.    CoQ
  2.    a cytochrome
  3.    FMN
  4.    oxygen
 Discuss Question
Answer: Option D. -> oxygen
Question 34.  Which of the following best explains about the usefulness of the production of ethanol in yeast cells under anaerobic conditions?
  1.    Ethanol keeps the electron transport system functioning
  2.    Yeast would be unable to activate the enzymes of the Krebs cycle without ethanol
  3.    The process generates oxygen, which is required for glycolysis
  4.    The process regenerates NAD+, which is required for glycolysis
 Discuss Question
Answer: Option D. -> The process regenerates NAD+, which is required for glycolysis
Question 35.  The amount of energy (cal/mole) in an ATP molecule produced by a cell from glucose by fermentation is
  1.    greater than aerobic metabolism
  2.    less than aerobic metabolism
  3.    exactly or approximately equal to aerobic metabolism
  4.    none of the above
 Discuss Question
Answer: Option C. -> exactly or approximately equal to aerobic metabolism
Question 36.  The enzymes for glycolysis are located
  1.    on the inner surface of the cell membrane
  2.    on the inner membrane of the mitochondrion
  3.    on the outer membrane of the chloroplast
  4.    in the cytoplasm
 Discuss Question
Answer: Option D. -> in the cytoplasm
Question 37. . The final electron acceptor in the electron transport chain is
  1.    CoQ
  2.    a cytochrome
  3.    FMN
  4.    oxygen
 Discuss Question
Answer: Option D. -> oxygen
Question 38. . Glucose can be broken down to pyruvate by
  1.    Entner-Doudoroff pathway
  2.    tricarboxylic acid cycle
  3.    both (a) and (b)
  4.    none of these
 Discuss Question
Answer: Option A. -> Entner-Doudoroff pathway
Question 39. . Which of the following best explains about the usefulness of the production of ethanol in yeast cells under anaerobic conditions?
  1.    Ethanol keeps the electron transport system functioning
  2.    Yeast would be unable to activate the enzymes of the Krebs cycle without ethanol
  3.    The process generates oxygen, which is required for glycolysis
  4.    The process regenerates NAD+, which is required for glycolysis
 Discuss Question
Answer: Option D. -> The process regenerates NAD+, which is required for glycolysis
Question 40. . The amount of energy (cal/mole) in an ATP molecule produced by a cell from glucose by fermentation is
  1.    greater than aerobic metabolism
  2.    less than aerobic metabolism
  3.    exactly or approximately equal to aerobic metabolism
  4.    none of the above
 Discuss Question
Answer: Option C. -> exactly or approximately equal to aerobic metabolism

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