When one $\mathrm{CO}_2$ molecule is fixed as one molecule of triose phosphate, which of the following…
When one $\mathrm{CO}_2$ molecule is fixed as one molecule of triose phosphate, which of the following photochemically made, high energy chemical intermediates are used in the reduction phase?
1 ATP +1 NADPH
1 ATP +2 NADPH
$2 \mathrm{ATP}+1 \mathrm{NADPH}$
2 ATP +2 NADPH
Solution
During $\mathrm{C}_3$ cycle (calvin cycle) 3 phases continue, namely carboxylation, Reduction \& regeneration. During reduction or fixation phase, each $\mathrm{CO}_2$ molecule require one mole of ATP and one mole of NADPH.