Paraquat Is an Herbicide That Blocks the Transfer of Electrons

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.