Self Quiz for the Light-Dependent Reactions

Study the material in this section and then write out the answers to these question.
Do not just click on the answers and write them out. This will not test your understanding of this tutorial.

1. Briefly describe the overall function of the light-dependent reactions in photosynthesis. (ans)

2. Where in the chloroplasts do the light-dependent reactions occur?

a. In the thylakoids. (ans)
b. In the stroma. (ans)

3. The parts of a photosystem that are able to trap light and transfer energy to a complex of chlorophyll molecules and proteins called the reaction center are called _____________. (ans)

4. In Photosystem II, the electrons lost by chlorophyll P680 molecules are replaced by:

a. the electrons traveling down the electron transport system of Photosystem I (ans)
b. the electrons released by the splitting of water (ans)

5. The primary function of Photosystem II is to produce:

a. ATP (ans)
b. NADPH (ans)

6. Briefly describe how ATP is generated by chemiosmosis during the light-dependent reactions of photosynthesis. (ans)

7. In Photosystem I, the electrons lost by chlorophyll P700 molecules are replaced by:

a. the electrons traveling down the electron transport system of Photosystem II (ans)
b. the electrons released by the splitting of water (ans)

8. The primary function of Photosystem I is to produce:

a. ATP (ans)
b. NADPH (ans)

9. Involves only Photosystem I and generates ATP but not NADPH. This best describes:

a. cyclic photophosphorylation (ans)
b. noncyclic photophosphorylation (ans)

• RETURN TO "LIGHT-DEPENDENT REACTIONS"
• RETURN TO UNIT 7 TABLE OF CONTENTS