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Home ‣ Biochemistry ‣ Photosynthesis and Respiration Comments
  • Question

  • 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

  • Correct Answer
  • O2 to make new H2O 

    • Photosynthesis and Respiration problems

    Search Results

    • 1. 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
    • 2. 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
    • 3. Electron transport systems play a vital role in

    • Options
    • A. Calvin cycle
    • B. photorespiration
    • C. light-dependent reactions
    • D. all of these
      • Discuss
    • 4. 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
    • 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. Glycolysis takes places in the __________ and produces __________ , which in the presence of oxygen then enters the __________ .

    • Options
    • A. cytosol; glucose; mitochondrion to complete fermentation
    • B. cytosol; pyruvate; mitochondrion to complete fermentation
    • C. cytosol; pyruvate; mitochondrion to complete cellular respiration
    • D. mitochondrion; pyruvate; chloroplast to complete photosynthesis
      • Discuss
    • 7. Which one of the following is a product of both cyclic and noncyclic photophosphorylation?

    • Options
    • A. NADPH
    • B. O2
    • C. ATP
    • D. Carbohydrate
      • Discuss
    • 8. NADP+ is reduced to NADPH during

    • Options
    • A. light dependent reactions
    • B. photorespiration
    • C. calvin cylcle
    • D. none of these
      • Discuss
    • 9. In noncyclic photophosphorylation, the ultimate acceptor of electrons that have been produced from the splitting of water is

    • Options
    • A. NADP+
    • B. chlorophyll a
    • C. carbon dioxide
    • D. chlorophyll b
      • Discuss
    • 10. Where do the protons come from that make up the proton gradient used in the light reactions of photosynthesis?

    • Options
    • A. Glucose
    • B. ATP
    • C. H2O
    • D. NADPH
      • Discuss

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