| AP Biology: Chapter 10 |
PHOTOSYNTHESIS
1. What role do autotrophs fill in the biosphere?
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2. Indicate the role of each structure within the leaf:
a. stomates _______________________________________________________________
b. mesophyll cells __________________________________________________________
c. thylakoid membranes _____________________________________________________
d. stroma _________________________________________________________________
3. What is the source of oxygen released from photosynthesis?
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4. In the overview of photosynthesis, indicate the most significant function of:
a. Light reaction ___________________________________________________________
b. Calvin cycle ____________________________________________________________
5. Light is a form of energy known as _____________________________________________
and visible light has a wavelength range of _______________________________________ .
6. Plant light receptors absorb _________________________________________ wavelengths
of light and reflect ___________________________________________wavelengths of light.
7. The porphyrin ring of chlorophyll contains the element ______________________________
and the role of the ring is to ___________________________________________________
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8. What does chlorophyll do when excited by photons? _______________________________
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9. Label the diagram and explain the difference between Photosystem I and Photosystem II.
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10. With 2 different colored pencils, follow the energy paths of both noncyclic and cyclic electron
flow in the diagram.
11. How does cyclic differ from noncyclic photophosphorylation?
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12. To generate ATP, chloroplasts rely on the ETC to _________________________________
and ATP is synthesized when: _________________________________________________
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13. Within the thylakoid membrane and stroma, indicate what happens to each of the following:
a. water __________________________________________________________________
b. high energy electrons _____________________________________________________
c. H+ ____________________________________________________________________
d. oxygen ________________________________________________________________
e. NADP+ ________________________________________________________________
f. ADP __________________________________________________________________
14. Where in the chloroplast is the H+ concentration highest? ___________________________
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15. What happens during carbon fixation? __________________________________________
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16. List the materials the plant uses during the Calvin cycle and the source of the materials.
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17. The products of the Calvin cycle are ____________________________________________
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18. What environmental and internal challenges have forced both C4 and CAM plants to evolve
alternatives to the photosynthesis system used by other plants?
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19. Why do high oxygen levels inhibit photosynthesis? ________________________________
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20. What happens during photorespiration and why is it considered bad for plants?
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21. What evolutionary adaptations to the Calvin cycle are seen in C4 plants like sugar cane?
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22. Draw a diagram to show the anatomical adaptations seen in C4 plants to accommodate their variation on the Calvin cycle.
23. What evolutionary adaptation to the Calvin cycle is seen in CAM plants like cacti?
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