Fixation of one CO_2 molecule through Calvin cycle requires.

Fixation of one

\mathrm{CO}_2

molecule through Calvin cycle requires.

Options

A1 ATP and $2 \mathrm{NADPH}_2$
B2 ATP and $2 \mathrm{NADPH}_2$
C3 ATP and $2 \mathrm{NADH}_2$
D2 ATP and 1NADPH ${ }_2$

Correct answer

C. 3 ATP and $2 \mathrm{NADH}_2$

Step-by-step solution

2 ATP are required during conversion of PGA to 1, 3 diphosphoglyceric acid and 1 ATP during conversioin of glyceraldehyde phosphate to ribulose biphosphate.

2 \mathrm{NADPH}_2

molecules are utilised for converting 1, 3 diphosphoglyceric acid to glyceraldehyde phosphate.

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