Photosynthesis Question 76
76. Fixation of one $CO_2$ molecule through Calvin cycle requires
[2000]
(a) 1 ATP and $2 NADPH_2$
(b) $2 ATP$ and $2 NADPH_2$
(c) $3 ATP$ and $2 NADPH_2$
(d) 2ATP and $1 NADPH_2$
Show Answer
Answer : c
Hints & Solution
(c) 2 ATP are required during conversion of PGA to 1,3-diphosphoglyceric acid and 1 ATP during conversion of glyceraldehyde phosphate to ribulose biphosphate. $2 NADH_2$ molecules are utilised for converting 1 , 3-diphosphoglyceric acid to glyceraldehyde phosphate.
