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MCQs

Total Questions : 88 | Page 5 of 9 pages
Question 41. What process in cellular respiration is essentially the reverse of carbon fixation in photosynthesis?
  1.    Oxidative phosphorylation
  2.    Alcohol fermentation
  3.    Glycolysis
  4.    Citric acid cycle
 Discuss Question
Answer: Option D. -> Citric acid cycle
Question 42. Glycolysis takes places in the __________ and produces __________ , which in the presence of oxygen then enters the __________ .
  1.    cytosol; glucose; mitochondrion to complete fermentation
  2.    cytosol; pyruvate; mitochondrion to complete cellular respiration
  3.    mitochondrion; pyruvate; chloroplast to complete photosynthesis
  4.    cytosol; pyruvate; mitochondrion to complete fermentation
 Discuss Question
Answer: Option B. -> cytosol; pyruvate; mitochondrion to complete cellular respiration
Question 43. If the oxygen is labeled in CO2 and provide this CO2 to a plant, where it is expected to find this labeled oxygen after the plant had undergone photosynthesis?
  1.    In the water used
  2.    In the carbohydrate produced
  3.    In the NADPH
  4.    In the oxygen given off by the plant
 Discuss Question
Answer: Option B. -> In the carbohydrate produced
Question 44. What do coenzyme A, CO2, oxaloacetate, and FADH2 all have in common?
  1.    They are part of the reactions of lactic acid fermentation
  2.    They are all elements of oxidative phosphorylation
  3.    They are part of the dark reactions of photosynthesis
  4.    They are all components or products of the citric acid cycle
 Discuss Question
Answer: Option D. -> They are all components or products of the citric acid cycle
Question 45.  Which of the following is the reduced form of a temporary electron carrier molecule?
  1.    FADH2
  2.    ATP
  3.    NADP+
  4.    CO2
 Discuss Question
Answer: Option A. -> FADH2
Question 46.  
The rate of photorespiration in most plants increases at.higher temperatures. Some plants have evolved a somewhat round-about system to deal with this problem. This series of reactions is called
  1.    ETS (electron transfer system in light reaction
  2.    C4 pathway
  3.    Photosystem II
  4.    Calvin cycle
 Discuss Question
Answer: Option B. -> C4 pathway
Question 47.  NADP+ is reduced to NADPH during
  1.    light dependent reactions
  2.    photorespiration
  3.    calvin cylcle
  4.    none of these
 Discuss Question
Answer: Option A. -> light dependent reactions
Question 48.  Which one of the following is a product of both cyclic and noncyclic photophosphorylation?
  1.    NADPH
  2.    O2
  3.    ATP
  4.    Carbohydrate
 Discuss Question
Answer: Option C. -> ATP
Question 49.  More ATP is manufactured during __________ than at any other time in all of cellular metabolism.
  1.    fermentation
  2.    glycolysis
  3.    the light reactions of photosynthesis
  4.    oxidative phosphorylation
 Discuss Question
Answer: Option D. -> oxidative phosphorylation
Question 50.  Which of the following represents a correct ordering of the events that occur during the respiration of glucose in the absence of O2?
  1.    Glycolysis; citric acid cycle; oxidative phosphorylation
  2.    Glycolysis; oxidative phosphorylation; citric acid cycle
  3.    Oxidative phosphorylation; citric acid cycle; glycolysis
  4.    Glycolysis; fermentation
 Discuss Question
Answer: Option D. -> Glycolysis; fermentation

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