Paraquat Is an Herbicide That Blocks the Transfer of Electrons

question 173

Multiple Choice

Paraquat is an herbicide that blocks the transfer of electrons from photosystem I to NADPH. Mechanistically, paraquat is effective because it:

• A)prevents the reduction of NADPH.
• B)prevents the formation of reactive oxygen species.
• C)increases the formation of reactive oxygen species.
• D)absorbs light energy that cannot then be used for photosynthesis.
• E)increases cyclic electron transport, which does not produce NADPH.

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