For assimilation of one CO_2 molecule; the energy required in form of ATP & NADPH_2

NEET 2000 Biology question

For assimilation of one CO molecule; the energy required in form of ATP & NADPH

(1)2 ATP & 2 NADPH
(2)5 ATP & 3 NADPH
(3)3 ATP & 2 NADPHCorrect
(4)18 ATP & 12 NADPH

Answer: (3)

Solution

In the Calvin cycle, fixing one CO requires 2 NADPH (reduction of 3-PGA to triose phosphate: 1 NADPH per 3-PGA, i.e. 2 per CO fixed) and 3 ATP (2 ATP for phosphorylation of 3-PGA to 1,3-BPGA and 1 ATP for

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Question ID VK-088640