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  4. Calvin cycle or dark reaction of photosynthesis is a light-independent reaction in which products of the light reaction are consumed. In which step of the Calvin cycle these products are not consumed?

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Q. Calvin cycle or dark reaction of photosynthesis is a light-independent reaction in which products of the light reaction are consumed. In which step of the Calvin cycle these products are not consumed?

NTA AbhyasNTA Abhyas 2020Photosynthesis in Higher Plants

Solution:

Calvin cycle or dark reaction of photosynthesis in which fixation of carbondioxide occurs to form glucose. It occurs in three steps carboxylation, reduction and regeneration. In carboxylation product of light reaction ATP and $N A D P H_{2}$ are not consumed, it is enzyme dependent process in which $CO_{2}$ is trapped into organic form.