Quiz 8

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In mechanism, photophosphorylation is most similar to

oxidative phosphorylation in cellular respiration

Which of the events listed below occurs in the light reactions of photosynthesis?

Light is absorbed and funneled to reaction-center chlorophyll a.

If photosynthesizing green algae are provided with CO2 synthesized with heavy oxygen (18O), later analysis will show that all but one of the following compounds produced by the algae contain the 18O label. That one is

O2.

Which statement describes the functioning of photosystem II?

The electron vacancies in P680+ are filled by electrons derived from water.

A gardener is concerned that her greenhouse is getting too hot from too much light, and seeks to shade her plants with colored translucent plastic sheets. What color should she use to reduce overall light energy, but still maximize plant growth?

blue

CAM plants keep stomata closed in daytime, thus reducing loss of water. They can do this because they

fix CO2 into organic acids during the night.

The NADPH required for the Calvin cycle comes from

reactions initiated in photosystem I.

What is the primary function of the Calvin cycle?

synthesize simple sugars from carbon dioxide

Reactions that require CO2 take place in

the Calvin cycle alone

Where are the molecules of the electron transport chain found in plant cells?

thylakoid membranes of chloroplasts


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