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At which point is G3P removed from the Calvin cycle to be used in the production of carbohydrates? A. During Photophosphorylation B. During carbon fixation C. Immediately after reduction D. Immediately after regeneration

Carlton Burgess

in Biology

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Carlton Burgess on November 12, 2018

The answer is C. The Calvin cycle occurs in the stroma or chloroplast in a plant cell. Involves the dark stage where the carbon dioxide is reduced by the protons created in the photolysis of the light stage of photosynthesis. The 3-phosphoglyceric acid (3-PGA) is phosphorylated by ATP and then immediately reduced by NADPH in the reduction step. After the reduction, G3P is formed and exits the cycle. Other G3Ps to regenerate in a ribulose-1,5-bisphosphate (RuBP) molecule acceptor for the cycle to continue.

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