PHOTOSYNTHESIS
THE CALVIN CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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NADPH and ATP
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glyceraldehyde 3-phosphate (G3P)
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NADPH and ADP
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NADH+ and ATP
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Detailed explanation-1: -The immediate products of one turn of the Calvin cycle are 2 glyceraldehyde-3-phosphate (G3P) molecules, 3 ADP, and 2 NADP+. (ADP and NADP+ are not really “products". They are regenerated and later used again in the light-dependent reactions).
Detailed explanation-2: -In stage 1, the enzyme RuBisCO incorporates carbon dioxide into an organic molecule, 3-PGA. In stage 2, the organic molecule is reduced using electrons supplied by NADPH. In stage 3, RuBP, the molecule that starts the cycle, is regenerated so that the cycle can continue.
Detailed explanation-3: -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).
Detailed explanation-4: -The third step is known as regeneration stage because Ribulose-bis phosphate that begins the cycle is regenerated from G3P.