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MCQs

Total Questions : 211 | Page 3 of 22 pages
Question 21. In cells having organelles, the steps of the Krebs cycle and the electron transport system occur in the
  1.    cell membrane
  2.    mitochondria
  3.    endoplasmic reticulum
  4.    none of these
 Discuss Question
Answer: Option B. -> mitochondria
Answer: (b).mitochondria
Question 22. A eukaryotic cell that can carry out only fermentation instead of the complete aerobic respiration of glucose
  1.    produces less CO₂
  2.    is lacking in O₂
  3.    has mitochondria present
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these
Question 23. What is the maximum absorption wavelength for photosystem I in green plants?
  1.    550 nm
  2.    600 nm
  3.    700 nm
  4.    750 nm
 Discuss Question
Answer: Option C. -> 700 nm
Answer: (c).700 nm
Question 24. As a result of the photosynthetic process, which product is formed?
  1.    Oxygen
  2.    Water
  3.    Carbon dioxide
  4.    Both (a) and (b)
 Discuss Question
Answer: Option A. -> Oxygen
Answer: (a).Oxygen
Question 25. Carbon dioxide is reduced in
  1.    noncyclic photophosphorylation
  2.    the Calvin cycle
  3.    the light reactions
  4.    both light and dark reactions
 Discuss Question
Answer: Option B. -> the Calvin cycle
Answer: (b).the Calvin cycle
Question 26. During the light-dependent reactions of photosynthesis, which of the following does not occur?
  1.    Splitting of water
  2.    Carbon dioxide fixation
  3.    Release of oxygen
  4.    Absorption of light energy by photosystems
 Discuss Question
Answer: Option B. -> Carbon dioxide fixation
Answer: (b).Carbon dioxide fixation
Question 27. Which of the following structures or processes are logically associated with chloroplasts?
  1.    Plant cells
  2.    Chlorophyll
  3.    Thylakoid membranes
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Answer: (d).All of these
Question 28. In oxygenic photosynthesis, water is split in order to provide the
  1.    electrons needed to reduce P680
  2.    O₂ needed for the dark reactions
  3.    electrons needed to reduce NADH
  4.    electrons needed for cyclic photophosphorylation
 Discuss Question
Answer: Option A. -> electrons needed to reduce P680
Answer: (a).electrons needed to reduce P680
Question 29. Oxidative phosphorylation is to respiration as __________ is to photosynthesis
  1.    carbon fixation
  2.    electron transport chain
  3.    light capture by chlorophyll
  4.    reduction of NADPH
 Discuss Question
Answer: Option B. -> electron transport chain
Answer: (b).electron transport chain
Question 30. Where do the protons come from that make up the proton gradient used in the light reactions of photosynthesis?
  1.    Glucose
  2.    ATP
  3.    H₂O
  4.    NADPH
 Discuss Question
Answer: Option C. -> H₂O
Answer: (c).H₂O

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