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C3, C4 and CAM Photosynthetic Pathways - Class XI
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How many ATP molecule are required in regeneration step for regeneration of $5$ molecule of RuBP in $C _3$ cycle?
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A
$5$
💡 Explanation:
In the C3 cycle (Calvin cycle), the regeneration of 5 molecules of RuBP requires ATP. Specifically, 1 ATP is consumed per RuBP regenerated during the phosphorylation of Ru5P to RuBP, so 5 molecules of RuBP require 5 ATP molecules.