In biology, which term refers to the light complex that helps reduce NADP⁺ to NADPH?

A) Photosystem I

B) RuBP

C) Citric acid cycle

D) Substrate-level phosphorylation

Answer: A

Explanation: Photosystem I refers to the light complex that helps reduce NADP⁺ to NADPH. It receives electrons after the transport chain.

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