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Photosynthesis and Respiration problems


  • 1. Carbon dioxide is reduced in

  • Options
  • A. noncyclic photophosphorylation
  • B. the Calvin cycle
  • C. the light reactions
  • D. both light and dark reactions
  • Discuss
  • 2. In the Calvin cycle, carbon dioxide is fixed in a reaction with the

  • Options
  • A. ribulose diphosphate
  • B. ribulose phosphate
  • C. ribose tri phosphate
  • D. 3-phosphoglyceric acid
  • Discuss
  • 3. Which enzyme is involved in carbon-fixation reaction?

  • Options
  • A. NADP reductase
  • B. Cytochrome reductase
  • C. Ribulose bisphosphate carboxylase
  • D. Glycerol kinase
  • Discuss
  • 4. The vast majority of the molecules that act as energy carriers to power cellular activities are made in

  • Options
  • A. the nucleus
  • B. the Golgi apparatus
  • C. the cytosol
  • D. the mitochondria and chloroplasts
  • Discuss
  • 5. Oxidative phosphorylation is to respiration as __________ is to photosynthesis

  • Options
  • A. carbon fixation
  • B. electron transport chain
  • C. light capture by chlorophyll
  • D. reduction of NADPH
  • Discuss
  • 6. Where does the O2 come from that is essential for the proper functioning of oxidative phosphorylation?

  • Options
  • A. Fermentation
  • B. Light reactions of photosynthesis
  • C. Dark reactions of photosynthesis
  • D. Carbon fixation
  • Discuss
  • 7. Electron transport systems play a vital role in

  • Options
  • A. Calvin cycle
  • B. photorespiration
  • C. light-dependent reactions
  • D. all of these
  • Discuss
  • 8. Which of the following represents a correct ordering of the events that occur during the respiration of glucose in the absence of O2?

  • Options
  • A. Glycolysis; citric acid cycle; oxidative phosphorylation
  • B. Glycolysis; oxidative phosphorylation; citric acid cycle
  • C. Oxidative phosphorylation; citric acid cycle; glycolysis
  • D. Glycolysis; fermentation
  • Discuss
  • 9. Which of the following structures or processes are logically associated with chloroplasts?

  • Options
  • A. Plant cells
  • B. Chlorophyll
  • C. Thylakoid membranes
  • D. All of these
  • Discuss
  • 10. 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

  • Options
  • A. O2 to make new H2O
  • B. NADPH to make new glucose
  • C. pyruvate to make ethanol
  • D. electron transport carriers to make O2
  • Discuss

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