Photosynthesis would stop
NADP+ is important in photosynthesis because they are significant in both light and dark phases of photosynthesis.
Explanation:
IN the light stage, NADP+ is the ultimate electron acceptor as high energy electrons are passed down a protein chain, from the reactive center of photosystems, as their energy is harnessed to create a proton motive force across the lamellae membrane. NADP+ is ultimately reduced to NADPH. Without NADP+, the electron transport chain would cease.
NADPH, on the other hand, is used to reduce carbon dioxide to glucose in the Calvin cycle. NADPH is oxidized to NADP+ which is recycled back to the light stage of photosynthesis.
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