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MCQs

Total Questions : 244 | Page 4 of 25 pages
Question 31. When one molecule of glucose is oxidized to two molecules of lactate during anaerobic glycolysis, which of the following statements is false?
  1.    Glyceraldehyde 3-P dehydrogenase reaction produces 2 ATP molecules
  2.    Lactate dehydrogenase reaction produces no ATP
  3.    Pyruvate kinase reaction produces 2 ATP molecules
  4.    Phosphofructokinase-1 reaction uses 1 ATP molecule
 Discuss Question
Answer: Option A. -> Glyceraldehyde 3-P dehydrogenase reaction produces 2 ATP molecules
Answer: (a).Glyceraldehyde 3-P dehydrogenase reaction produces 2 ATP molecules
Question 32. The end products in ethanol fermentation are
  1.    Ethanol and CO₂
  2.    Ethanol and O₂
  3.    Ethanol, H₂ and CO₂
  4.    Ethanol, O₂ and CO₂
 Discuss Question
Answer: Option A. -> Ethanol and CO₂
Answer: (a).Ethanol and CO₂
Question 33. For its activity, pyruvate decarboxylase requires
  1.    Mg⁺²
  2.    Ca⁺²
  3.    Na⁺
  4.    H⁺
 Discuss Question
Answer: Option A. -> Mg⁺²
Answer: (a).Mg⁺²
Question 34. In the reduction of pyruvate to lactate, which of the following is regenerated?
  1.    H⁺
  2.    NADH
  3.    NAD⁺
  4.    Na⁺
 Discuss Question
Answer: Option C. -> NAD⁺
Answer: (c).NAD⁺
Question 35. TPP (thiamine pyrophosphate) is derived from
  1.    Vitamin A
  2.    Vitamin B1
  3.    Vitamin C
  4.    Vitamin B2
 Discuss Question
Answer: Option B. -> Vitamin B1
Answer: (b).Vitamin B1
Question 36. How many steps are catalyzed by different enzymes in glycolysis and gluconeogenesis?
  1.    2
  2.    3
  3.    4
  4.    5
 Discuss Question
Answer: Option B. -> 3
Answer: (b).3
Question 37. The second control point in gluconeogenesis is the reaction catalyzed by
  1.    Pyruvate kinase
  2.    Pyruvate dehydrogenase
  3.    FBPase-1
  4.    PFK-1
 Discuss Question
Answer: Option C. -> FBPase-1
Answer: (c).FBPase-1
Question 38. Three reactions of glycolysis are so exergonic, which are not catalyzed by
  1.    Hexokinase
  2.    PFK-1
  3.    Pyruvate kinase
  4.    Pyruvate dehydrogenase
 Discuss Question
Answer: Option D. -> Pyruvate dehydrogenase
Answer: (d).Pyruvate dehydrogenase
Question 39. Which of the following statements is true about PFK-1?
  1.    It is stimulated by AMP and ADP
  2.    It is stimulated by citrate and ATP
  3.    It is inhibited by AMP and ADP
  4.    It is stimulated by citrate and ADP
 Discuss Question
Answer: Option A. -> It is stimulated by AMP and ADP
Answer: (a).It is stimulated by AMP and ADP
Question 40. What are the effects of increased concentration of citrate?
  1.    Increases the inhibitory effect of ATP
  2.    Decreases the inhibitory effect of ATP
  3.    Increases the activity of ATP
  4.    Increases the activity of AMP
 Discuss Question
Answer: Option A. -> Increases the inhibitory effect of ATP
Answer: (a).Increases the inhibitory effect of ATP

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