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Let's say a toxin blocked the NADP reductase, preventing it from donating NADP+. Would the photosynthetic...

Let's say a toxin blocked the NADP reductase, preventing it from donating NADP+. Would the photosynthetic ETC still work? Would the chloroplast still be able to perform photosynthesis?

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Electron transport chains are major sites of premature electron leakage to oxygen, generating superoxide and potentially resulting in increased oxidative stress. This oxidative stress would lead to increased amount of ROS.The increased ROS leads to poisioning (it will oxidize the cellular components and will eventually inhibit the ETC .

Chloroplast will not be able to perform photosynthesis as NADP Reductase has stopped functioning leading to generation of of no assimilatory power during light reaction i.e NADPH. This will lead to no formation of carbohydrates during dark reaction hence chloroplast will also be not able to perform photosynthesis

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