Photosynthesis Questions Online Test 6

1. Where does the Calvin cycle take place?

• stroma of the chloroplast
• thylakoid membrane
• cytoplasm surrounding the chloroplast
• chlorophyll molecule

2. A plant 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?

• red and yellow
• blue and violet
• green and yellow
• blue, green, and red

3. In the thylakoid membranes, what is the main role of the antenna pigment molecules?

• split water and release oxygen to the reaction-center chlorophyll
• harvest photons and transfer light energy to the reaction-center chlorophyll
• synthesize ATP from ADP and Pi
• transfer electrons to ferredoxin and then NADPH

4. Which of the following statements about the light reactions of photosynthesis are true?

• The splitting of water molecules provides a source of electrons.
• Chlorophyll (and other pigments) absorb light energy, which excites electrons.
• ATP is generated by photophosphorylation
• Only A and C are true
• A, B, and C are true

5. What does cyclic electron flow in the chloroplast produce?

• ATP
• NADPH
• glucose
• A and B

6. Assume a thylakoid is somehow punctured so that the interior of the thylakoid is no longer separated from the stroma. This damage will have the most direct effect on which of the following processes?

• the splitting of water
• the absorption of light energy by chlorophyll
• the flow of electrons from photosystem II to photosystem I
• the synthesis of ATP

7. What does the chemiosmotic process in chloroplasts involve?

• establishment of a proton gradient
• diffusion of electrons through the thylakoid membrane
• reduction of water to produce ATP energy
• movement of water by osmosis into the thylakoid space from the stroma

8. In a plant cell, where are the ATP synthase complexes located?

• thylakoid membrane
• plasma membrane
• inner mitochondrial membrane
• A and C

9. In mitochondria, chemiosmosis translocates protons from the matrix into the intermembrane space, whereas in chloroplasts, chemiosmosis translocates protons from

• the stroma to the photosystem II
• the matrix to the stroma
• the stroma to the thylakoid space
• the intermembrane space to the matrix

10. Which of the following statements best describes the relationship between photosynthesis and respiration?

• Respiration is the reversal of the biochemical pathways of photosynthesis
• Photosynthesis stores energy in complex organic molecules, while respiration releases it
• Photosynthesis occurs only in plants and respiration occurs only in animals
• ATP molecules are produced in photosynthesis and used up in respiration

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