PHOTOSYNTHESIS
THE CALVIN CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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NADP+
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NADPH
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ATP
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G3P (to form glucose)
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Detailed explanation-1: -The dark reaction occurs outside of the thylakoids. In this reaction, the energy from ATP and NADPH are used to fix carbon dioxide (CO2). The products of this reaction are sugar molecules and other organic molecules necessary for cell function and metabolism.
Detailed explanation-2: -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). Each G3P molecule is composed of 3 carbons.
Detailed explanation-3: -Overall, the reactants of the Calvin cycle are CO2, ATP, and NADPH, and the products are G3P, ADP, and NADP+. The CO2 is used during the first stage as it is fixed to RuBP by RuBisCo.
Detailed explanation-4: -The last stage of the cycle is the regeneration stage where RuBP is regenerated so that more carbon dioxide can be fixed in the plants. So the answer is ‘c) Light’.