Problem

Three of the same species of plant are each grown…

03:12

Problem 13 Easy Difficulty

From which component of the light-dependent reactions does NADPH form most directly?
a. photosystem II
b. photosystem I
c. cytochrome complex
d. ATP synthase

Answer

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Nicholas M.

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Video Transcript

The question is asking us about any D. PH, which is a product of the light reactions. And it's asking us which serve component um, that's listed is most involved in making an 80 pH. And the answer is B, and that is photo system one. So photo system to is largely involved in pumping protons across the membrane, uh, helps establish ah, proton ingredient on photo system one. What happens is that trust is the one takes energy or captures energy from the sun, so it takes sunlight, and it uses the energy from the sunlight from the photons to re excite reenergize the electrons that went through the electron transport chain. And then it passes these electrons, uh, to the n a d. P um, but it does it with the help of an enzyme called N a D. P plus reductase. The reductive a part means that it's reducing something to remember to reduce something stuff. Despite the fact it doesn't sound like it. Reducing something means to add electrons to it. So what happens is, is that you have in a e p what he gets electrons and the electrons serves show up with the hydrogen because of picking up a hydrogen proton, proton, um two. And the electrons are part of the bond there, and you end up making in a the P H. And that, of course, isn't a central component in the Calvin cycle. So PS one first someone is the one that's most intimately involved in producing an 18 ph.

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