BIOCHEMISTRY
ENZYMES AND METABOLISM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Once.
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Three times.
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Twice.
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Six times.
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Detailed explanation-1: -A molecule of glucose is made up of six carbon molecules. Therefore, six turns will be required for the synthesis of one molecule of glucose by Calvin cycle.
Detailed explanation-2: -Instead, it takes 3 of each reactant to produce PGAL, which happens two times to lead to production of 1 glucose molecule. This is why it takes 2 cycles to produce one glucose molecule.
Detailed explanation-3: -Once the Calvin Cycle “turns” twice (well, actually 6 times), those 2 molecules of G3P (a 3-carbon carbohydrate) will combine to form 1 molecule of glucose (a 6-carbon carbohydrate molecule) OR another organic compound.
Detailed explanation-4: -The Calvin cycle must be completed twice in order for enough G3P to be available to produce one molecule of the sugar glucose.
Detailed explanation-5: -So, for 2 sucrose molecules, 12 times calvin cycle occurs.