A Plant Is Treated with a Chemical That Blocks the Flow

question 54

Multiple Choice

A plant is treated with a chemical that blocks the flow of electrons between photosystem II and photosystem I,such that protons are not transported from the stroma into the thylakoid compartment.What is the effect of this chemical on photosynthesis?

• A)the increased number of protons will be directly used in the thylakoid to produce glucose
• B)an increased proton gradient will provide the energy needed to produce ATP from the light reactions
• C)a decreased proton gradient will cause less ATP to be produced from the light reactions
• D)the increased proton gradient will be used to make NADPH for the Calvin cycle

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