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Question
The number of NADH molecules that are used during the conversion of carbon dioxide into one molecule of glucose are
The number of NADH molecules that are used during the conversion of carbon dioxide into one molecule of glucose are
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Solution
The correct option is D 12
Formation of one molecule of glucose (6C) requires 6 turns of Calvin cycle as 3 turns of carbon fixation obtains net one molecule of glyceraldehyde 3 phosphate (G3P; 3C) and two molecules of G3P are required to make one molecule of 6 carbon glucose. One turn of Calvin cycle fixes one molecule of carbon dioxide and requires 2 molecules of NADPH for reduction of 1,3 bisphosphoglycerate into glyceraldehyde 3 phosphate. So, 6 turns of Calvin cycle require 6 x 2= 12 NADPH. Thus, the correct answer is option E.
Formation of one molecule of glucose (6C) requires 6 turns of Calvin cycle as 3 turns of carbon fixation obtains net one molecule of glyceraldehyde 3 phosphate (G3P; 3C) and two molecules of G3P are required to make one molecule of 6 carbon glucose. One turn of Calvin cycle fixes one molecule of carbon dioxide and requires 2 molecules of NADPH for reduction of 1,3 bisphosphoglycerate into glyceraldehyde 3 phosphate. So, 6 turns of Calvin cycle require 6 x 2= 12 NADPH. Thus, the correct answer is option E.
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