PLANT PHYSIOLOGY
PHOTOSYNTHESIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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photosystem II
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photosystem I
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cytochrome complex
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ATP synthase
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Detailed explanation-1: -ATP synthase. From photosystem I component of the light-dependent reactions does NADPH form most directly. Option (b) is the correct answer.
Detailed explanation-2: -NADPH is formed on the stromal side of the thylakoid membrane, so it is released into the stroma.
Detailed explanation-3: -Electrons are transferred sequentially between the two photosystems, with photosystem I acting to generate NADPH and photosystem II acting to generate ATP.
Detailed explanation-4: -Under sunlight, photosynthetic electron transfer chains (PETC) are the primary source of NADPH. Plants use sunlight as a primary energy source for photosynthesis in chloroplasts (Ort and Yocum, 1996).
Detailed explanation-5: -2: The light-independent reactions (Calvin cycle) has three stages. In stage 1, the enzyme RuBisCO adds carbon dioxide to RuBP, which immediately splits, producing two three-carbon 3-PGA molecules. In stage 2, two NADPH and two ATP are used to reduce 3-PGA to GA3P.