PLANT PHYSIOLOGY
PHOTOSYNTHESIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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NADPH
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ATP
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Water
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Oxygen gas
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Detailed explanation-1: -Answer and Explanation: The H+ generated during the light reactions A) build up inside the thylakoid membranes until they pass through an ATP synthase proton pump where the released energy helps make ATP.
Detailed explanation-2: -The light-dependent reactions use light energy to make two molecules needed for the next stage of photosynthesis: the energy storage molecule ATP and the reduced electron carrier NADPH. In plants, the light reactions take place in the thylakoid membranes of organelles called chloroplasts.
Detailed explanation-3: -PQH2 passes these to the Cytochrome b6f complex (Cb6f) which uses passage of electrons through it to pump protons into the thylakoid space. ATP synthase makes ATP from the proton gradient created in this way.
Detailed explanation-4: -The purpose of the ectron Transport Chain is to pump H+ ions into the thylakoid in order to create large concentration on one side of the membrane: This concentration gradient then powers: Photosystem NADPH Photosystem II ATP Synthase.