Identify the incorrect statement with respect | vedclass

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Question

(A) The incorrect statement is $A$. In the Calvin cycle,$18$ molecules of $ATP$ are not synthesized during carbon fixation; rather,$ATP$ is consumed.

Vedclass · Accepted Answer

$18$ molecules of $ATP$ are synthesised during carbon fixation.

Vedclass · Answer

(A) The incorrect statement is $A$. In the Calvin cycle,$18$ molecules of $ATP$ are not synthesized during carbon fixation; rather,$ATP$ is consumed. To produce one molecule of glucose ($6$ carbons),the Calvin cycle must turn $6$ times. Each turn requires $3$ $ATP$ and $2$ $NADPH$ molecules. Therefore,a total of $18$ $ATP$ and $12$ $NADPH$ are consumed,not synthesized,during the process. Option $B$ is correct as $NADPH$ is used for the reduction of $1,3$-bisphosphoglycerate to glyceraldehyde-$3$-phosphate. Option $C$ is correct as $RuBisCO$ is the enzyme responsible for the carboxylation of $RuBP$. Option $D$ is correct as $3$-phosphoglycerate ($3$-$PGA$) is the first stable product of the Calvin cycle.

Identify the incorrect statement with respect to Calvin cycle.

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