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(C) In the Calvin cycle,the fixation of $1$ molecule of $CO_2$ involves three stages: carboxylation,reduction,and regeneration.During the reduction ph

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$3$ molecules of $ATP$ and $2$ molecules of $NADPH$

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(C) In the Calvin cycle,the fixation of $1$ molecule of $CO_2$ involves three stages: carboxylation,reduction,and regeneration.During the reduction phase,$2$ molecules of $ATP$ and $2$ molecules of $NADPH$ are used for the reduction of $1$ molecule of $3-PGA$ to $G3P$.Additionally,$1$ molecule of $ATP$ is required during the regeneration phase to convert $RuMP$ back into $RuBP$.Therefore,for the fixation of $1$ molecule of $CO_2$,a total of $3$ molecules of $ATP$ and $2$ molecules of $NADPH$ are consumed.

How many molecules of $ATP$ and $NADPH$ are required for every molecule of $CO_2$ fixed in the Calvin cycle?

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