Photosynthesis

Photosynthesis

1. After leaving P680, where does an electron go next?
a. Ferredoxin
b. NADP+
c. P700
d. Plastocyanin
e. Plastoquinone

2. Your lab partner observes a structure which has porins and thylakoid membranes. Which of the following are you sure that is also has?
a. Bacteriochlorophyll a
b. Chlorophyll a
c. Chlorophyll b
d. Phycoerythrin
e. None of the above

3. Which process produces carbon dioxide?
a. Cyclic photophosphorylation
b. Noncyclic photophosphorylation
c. Both light reactions
d. Calvin cycle
e. None of the above

4. Which process is a series of redox reactions?
a. Cyclic photophosphorylation
b. Noncyclic photophosphorylation
c. Both light reactions
d. Calvin cycle
e. None of the above

5. Which process uses light-energized electrons?
a. Cyclic photophosphorylation
b. Noncyclic photophosphorylation
c. Both light reactions
d. Calvin cycle
e. None of the above

6. Which process produces NADPH?
a. Cyclic photophosphorylation
b. Noncyclic photophosphorylation
c. Both light reactions
d. Calvin cycle
e. None of the above

7. Which process produces phosphoglyceraldehyde?
a. Cyclic photophosphorylation
b. Noncyclic photophosphorylation
c. Both light reactions
d. Calvin cycle
e. None of the above

8. All of the following occur in photosynthesis and respiration except:
a. Electron flow
b. Splitting water molecules
c. Synthesis of ATP
d. Establishing a proton gradient
e. Electron carriers embedded in a membrane

9. Electrons are replaced in P700 from:
a. Water
b. NADPH
c. Plastocyanin
d. Chlorophyll b
e. Photosystem I

10. Which of the following processes does not generate ATP?
a. Photophosphorylation
b. Calvin cycle
c. Oxidative phosphorylation
d. Substrate-level phosphorylation
e. None of the above

11. All of the following conditions are necessary for rubisco to combine with CO2 except
a. Mg (2+)
b. Molecular oxygen
c. pH 8
d. Light
e. Rubisco activase

12. Electrons pass through the following sites in the Z-scheme for photosynthesis. Which is the first step?
a. Cytochrome b6-f complex
b. NADPH
c. P680
d. P700
e. Plastoquinone

13. If you studied a plant with tritium-labeled water, where would you find the H-3 in the products of photosynthesis?
a. Oxygen
b. Carbon dioxide
c. Water
d. Glucose
e. Chlorophyll

14. All of the following are true about photorespiration except that:
a. It generates ATP
b. It occurs in C3 plants
c. It occurs in temperate-zone plants
d. CAM plants avoid it by closign their stomata during the day
e. It involves rubisco

15. Which of the following is not required at some stage during the process of photosynthesis?
a. ADP
b. Molecular oxygen
c. Water
d. ATP
e. NADP+