How Much Do You Know About Photosynthesis? Quiz

10 Questions

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Questions and Answers
  • 1. 
    Explain (specifically) why the dark reactions of photosynthesis are cyclic.
  • 2. 
  • 3. 
    The specific energy source for the reaction ADP + phosphate ATP by the enzyme ATP synthetase in thylakoid membranes is
    • A. 

      Movement of electrons between photosystem II and photosystem I

    • B. 

      Splitting of a water molecule

    • C. 

      Creation of a molecule of NADPH

    • D. 

      Absorption of photons by chloroplast pigments

    • E. 

      Higher concentration of H+ inside versus outside the thylakoid membranes

  • 4. 
    Which would you expect to increase the rate of photosynthesis?
    • A. 

      Increasing the carbon dioxide concentration

    • B. 

      Decreasing the intensity of exposure to light

    • C. 

      Increasing the oxygen concentration

    • D. 

      Decreasing the duration of exposure to light

  • 5. 
    If you see bubbles coming off of underwater plants, what are you seeing?
    • A. 

      Oxygen bubbles from reactions in photosystem I

    • B. 

      Oxygen bubbles from reactions in photosystem II

    • C. 

      Carbon dioxide bubbles from reactions in photosystem I

    • D. 

      Carbon dioxide bubbles from reactions in photosystem II

  • 6. 
    Why are electron transport systems important in photosynthesis?
    • A. 

      They create NADP+ from NADPH for later use in syntheses

    • B. 

      They provide the energy needed to split a molecule of carbon dioxide

    • C. 

      They convert ATP into ADP which provides a store of energy

    • D. 

      They convert ADP into ATP which provides a store of energy

  • 7. 
    Energy is released from ATP when
    • A. 

      A phosphate group is added.

    • B. 

      Adenine bonds to ribose.

    • C. 

      ATP is exposed to sunlight.

    • D. 

      A phosphate group is removed.

  • 8. 
    In the Calvin cycle
    • A. 

      Carbon dioxide is used to create organic molecules

    • B. 

      Energy in the form of ATP is used

    • C. 

      NADPH is required

    • D. 

      Glucose is formed

    • E. 

      All of these

  • 9. 
    Where do the light-dependent reactions take place?
    • A. 

      In the stroma

    • B. 

      Outside the chloroplasts

    • C. 

      In the thylakoid membranes

    • D. 

      Only in chlorophyll molecules

  • 10. 
    In the light-dependent reactions
    • A. 

      Carbon dioxide is fixed

    • B. 

      ATP and NADPH form

    • C. 

      Carbon dioxide accepts electrons

    • D. 

      Glucose molecules form