PHOTOSYNTHESIS
PHOTOSYSTEMS
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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ATP
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NADPH
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NAD+
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glucose
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Detailed explanation-1: -This is accomplished by the use of two different photosystems in the light reactions of photosynthesis, one to generate ATP and the other to generate NADPH. Electrons are transferred sequentially between the two photosystems, with photosystem I acting to generate NADPH and photosystem II acting to generate ATP.
Detailed explanation-2: -The oxygen-evolving center of photosystem II is a complicated cluster of manganese ions (magenta), calcium (blue green) and oxygen atoms (red). It grips two water molecules and removes four electrons, forming oxygen gas and four hydrogen ions.
Detailed explanation-3: -PSII serves as a light-driven water-plastoquinone oxidoreductase, which extracts electrons from water to fuel the PET chain, and produces molecular oxygen as a by-product.
Detailed explanation-4: -In the second stage, ATP and NADPH are used to convert the 3-PGA molecules into molecules of a three-carbon sugar, glyceraldehyde-3-phosphate (G3P).