NEET 2026, Biology Q27: Dark Reactions and Photorespiration

One turn of the Calvin cycle fixes a single CO${}_2$ molecule using 3 ATP and 2 NADPH+H${}^{+}$.

For one glucose molecule, 6 turns are needed, requiring $6\times 3=18$ ATP and $6\times 2=12$ NADPH+H${}^{+}$.