During the dark reaction of photosynthesis:

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(B) The dark reaction of photosynthesis,also known as the Calvin cycle or light-independent reaction,occurs in the stroma of the chloroplast.During th

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$CO_2$ is reduced to organic compounds.

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(B) The dark reaction of photosynthesis,also known as the Calvin cycle or light-independent reaction,occurs in the stroma of the chloroplast.During this process,the energy stored in $ATP$ and $NADPH$ (produced during the light reaction) is used to fix atmospheric $CO_2$ into organic compounds like glucose.Photolysis of water and activation of chlorophyll are events associated with the light-dependent reaction,not the dark reaction.Therefore,the correct statement is that $CO_2$ is reduced to organic compounds.

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