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MCQs

Total Questions : 88 | Page 4 of 9 pages
Question 31. The breakdown of glucose occurs by the process known as
  1.    glycolysis
  2.    Krebs cycle
  3.    anaerobic respiration
  4.    fermentation
 Discuss Question
Answer: Option A. -> glycolysis
Question 32. In noncyclic photophosphorylation, the ultimate acceptor of electrons that have been produced from the splitting of water is
  1.    chlorophyll b
  2.    NADP+
  3.    chlorophyll a
  4.    carbon dioxide
 Discuss Question
Answer: Option D. -> carbon dioxide
Question 33. In algae, photosynthesis takes place in
  1.    cell membrane
  2.    choloroplasts
  3.    mitochondria
  4.    None of these
 Discuss Question
Answer: Option B. -> choloroplasts
Question 34. The manufacture of ATP in both photosynthesis and respiration is made possible by
  1.    All of these
  2.    the existence of a proton gradient across specific membranes
  3.    the action of ATP synthase
  4.    energy from the movement of electrons
 Discuss Question
Answer: Option A. -> All of these
Question 35. The end products of noncyclic photophosphorylation are
  1.    water, ADP and NADP+
  2.    carbon dioxide, PGAL (phosphoglyceraldehyde), and H2
  3.    O2, ATP and NADPH
  4.    carbon dioxide, ATP and water
 Discuss Question
Answer: Option C. -> O2, ATP and NADPH
Question 36. Assume the combined processes of photosynthesis and cellular respiration, the electrons that start as part of H2O at the beginning of the light reactions end up attaching to
  1.    NADPH to make new glucose
  2.    electron transport carriers to make O2
  3.    pyruvate to make ethanol
  4.    O2 to make new H2O
 Discuss Question
Answer: Option D. -> O2 to make new H2O
Question 37. Which enzyme is involved in carbon-fixation reaction?
  1.    Glycerol kinase
  2.    NADP reductase
  3.    Ribulose bisphosphate carboxylase
  4.    Cytochrome reductase
 Discuss Question
Answer: Option C. -> Ribulose bisphosphate carboxylase
Question 38. Rubisco (RuBP Carboxylase-oxygenase enzyme), glyceraldehyde 3-phosphate, and NADPH all play a role in
  1.    the dark reactions of photosynthesis
  2.    alcohol fermentation
  3.    cellular respiration when O2 is present
  4.    the breakdown of glucose into CO2
 Discuss Question
Answer: Option A. -> the dark reactions of photosynthesis
Question 39. The electrons that are released by the splitting of water during photosynthesis ultimately end up in
  1.    rubisco
  2.    NADPH
  3.    O2
  4.    ATP
 Discuss Question
Answer: Option B. -> NADPH
Question 40. In the initial step of photosynthesis, sunlight energizes the electron pair of
  1.    chlorophyll pigments
  2.    water
  3.    carbon dioxide
  4.    adenosine triphosphate (ATP)
 Discuss Question
Answer: Option A. -> chlorophyll pigments

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