1. Refer to Figure, click here, which shows the absorption spectrum for chlorophyll a and the action spectrum for photosynthesis.  Why are they different?
     a. Green and yellow wavelengths inhibit the absorption of red and
        blue wavelengths.
     b. Bright sunlight destroys photosynthetic pigments.
     c. The two lines are probably the result of inaccurate measurements.
     d. Other pigments absorb light in addition to chlorophyll a.
     e. Anaerobic bacteria probably interfered with light absorption.

  2. Which of the following statements about the light reactions of
     photosynthesis is FALSE?
     a. The splitting of water molecules provides a source of electrons.
     b. Chlorophyll (and other pigments) absorb light energy which
        excites electrons.
     c. An electron transport chain is used to create a proton gradient.
     d. A proton gradient is used to reduce NADP.
     e. Some electrons are recycled and some are not.

  3. Which of the following are products of the Calvin cycle and are
     utilized in the light reactions of photosynthesis?
               a. CO2 and glucose
               b. H2O and O2
              c. ADP, Pi, and NADP+
               d. Electrons and H+
             e. Both c & d

  4. From the photosynthetic action spectrum in Figure 10.7, we can
     correctly conclude that
     a. chlorophyll absorbs more green than red light.
     b. plants can use all colors of visible light for photosynthesis.
     c. every color of light is equally good for photosynthesis.
     d. light in the green range produces the most efficient
        photosynthesis.
     e. there are two photosystems in leaves: one for red, one for blue.

5. The primary function of the light reactions of photosynthesis is
     a. to produce energy-rich glucose from carbon dioxide and water.
     b. to produce energy-rich ATP and NADPH.
     c. to produce NADPH used in respiration.
     d. to convert light energy to the chemical energy of PGAL.
     e. to use ATP to make glucose.

6. The reactions of the Calvin cycle require all of the following
     molecules EXCEPT
     a. CO2.
     b. ATP.
     c. RuBP.
     d. glucose.
     e. NADPH.

7. All of the following statements are true EXCEPT:
     a. Thylakoid membranes contain the photosynthetic pigments.
     b. The O 2 released during photosynthesis comes from water.
     c. Glyceraldehyde phosphate is produced only in the light reactions
        of photosynthesis.
     d. The light reactions of photosynthesis provide the energy for the
        Calvin cycle.
     e. When chlorophyll is reduced, it gains electrons.

8. You have just discovered a new flower species that has a unique
     photosynthetic pigment. The leaves of this plant appear to be
     reddish yellow. What wavelengths of visible light are not being
     absorbed by this pigment?
     a. red and yellow
     b. blue and violet
     c. green and yellow
     d. blue, green, and red
     e. green, blue, and violet

9. All of the events listed below occur in the energy-capturing
     light reactions of photosynthesis EXCEPT
     a. Oxygen is produced.
     b. NADP+ is reduced to NADPH.
     c. Carbon dioxide is incorporated into PGA.
     d. ADP is phosphorylated to yield ATP.
     e. Light is absorbed.

10. The chemiosomotic process in chloroplasts involves the
     a. establishment of a proton gradient.
     b. diffusion of electrons through the thylakiod membrane.
     c. oxidation of water to produce ATP energy.
     d. movement of water by osmosis into the thylakoid space from the
        stroma.
     e. reduction of carbon dioxide to glucose by NADPH and ATP.