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Home Biochemistry Photosynthesis and Respiration Comments

  • Question
  • In the initial step of photosynthesis, sunlight energizes the electron pair of


  • Options
  • A. adenosine triphosphate (ATP)
  • B. chlorophyll pigments
  • C. water
  • D. carbon dioxide

  • Correct Answer
  • chlorophyll pigments 


  • Photosynthesis and Respiration problems


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    • 1. The breakdown of glucose occurs by the process known as

    • Options
    • A. glycolysis
    • B. fermentation
    • C. anaerobic respiration
    • D. Krebs cycle
    • Discuss
    • 2. A cyclic electron transport process is the characteristic of

    • Options
    • A. photosynthesis
    • B. methane oxidation
    • C. sulfide oxidation
    • D. methane production
    • Discuss
    • 3. The rate of photorespiration in most plants increases at.higher temperatures. Some plants have evolved a somewhat round-about system to deal with this problem. This series of reactions is called

    • Options
    • A. ETS (electron transfer system in light reactions
    • B. C4 pathway
    • C. Photosystem II
    • D. Calvin cycle
    • Discuss
    • 4. What is the maximum absorption wavelength for photosystem I in green plants?

    • Options
    • A. 550 nm
    • B. 600 nm
    • C. 700 nm
    • D. 750 nm
    • Discuss
    • 5. During the light-dependent reactions of photosynthesis, which of the following does not occur?

    • Options
    • A. Splitting of water
    • B. Carbon dioxide fixation
    • C. Release of oxygen
    • D. Absorption of light energy by photosystems
    • Discuss
    • 6. Antenna complexes, electron transport chains, and carbon fixation are all found in

    • Options
    • A. animal cells
    • B. bacterial cells
    • C. plant cells
    • D. association with the reactions of the citric acid cycle
    • Discuss
    • 7. Which of the following statements about energy metabolism is false?

    • Options
    • A. The energy that powers living systems ultimately comes from the sun
    • B. All animals in some way rely on plants for their energy
    • C. Plants provide the water and CO2 that animals need to carry out respiration
    • D. All eukaryotic organisms carry out respiration in the presence of O2
    • Discuss
    • 8. What do NAD+, NADP+, and FAD+ all have in common?

    • Options
    • A. They are reduced
    • B. They have a full complement of electrons
    • C. They are oxidized
    • D. They are what is used during carbon fixation in photosynthesis
    • Discuss
    • 9. In oxygenic photosynthesis, the electron donor is

    • Options
    • A. water
    • B. oxygen
    • C. NADH
    • D. NADPH
    • Discuss
    • 10. The cytochrome c oxidase complex

    • Options
    • A. accepts electrons from cyt c
    • B. donates four electrons to O2
    • C. pumps protons out of the matrix space
    • D. all of these
    • Discuss


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