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Home Biochemistry Photosynthesis and Respiration Comments

  • Question
  • 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

  • Correct Answer
  • ribulose diphosphate 


  • Photosynthesis and Respiration problems


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    • 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. Which of the following enzyme does not take part in the TCA cycle?

    • Options
    • A. Citrate synthase
    • B. Iso-citrate dehydrogenase
    • C. Pyruvate dehydrogenase
    • D. Malate dehydrogenase
    • Discuss
    • 3. How many ATPs are produced during citric acid cycle?

    • Options
    • A. 10
    • B. 13
    • C. 12
    • D. 8
    • Discuss
    • 4. Cholesterol can be synthesized de novo in

    • Options
    • A. pancreas
    • B. intestine
    • C. liver
    • D. cell membrane
    • Discuss
    • 5. The first intermediate in TCA cycle is

    • Options
    • A. succinate
    • B. fumerate
    • C. citrate
    • D. malate
    • Discuss
    • 6. Which enzyme is involved in carbon-fixation reaction?

    • Options
    • A. NADP reductase
    • B. Cytochrome reductase
    • C. Ribulose bisphosphate carboxylase
    • D. Glycerol kinase
    • Discuss
    • 7. 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
    • 8. 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
    • 9. 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
    • 10. Electron transport systems play a vital role in

    • Options
    • A. Calvin cycle
    • B. photorespiration
    • C. light-dependent reactions
    • D. all of these
    • Discuss


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