Question
How many ATP and NADPH molecules are required to make one molecule of glucose through the Calvin pathway ?
NEET
Botany
Photosynthesis in Higher Plants
2026
NEET 2026 (Cancelled)
NEET Botany Question (2026) — Solution
Options
- A. 18 ATP and 12 NADPH
- B. 12 ATP and 18 NADPH
- C. 24 ATP and 18 NADPH
- D. 6 ATP and 12 NADPH
Answer
A. 18 ATP and 12 NADPH
Step-by-step solution
In the Calvin cycle, the fixation of one molecule of CO_2 requires 3 ATP and 2 NADPH molecules. To synthesize one molecule of glucose, 6 molecules of CO_2 must be fixed. Total ATP required = 6 3 = 18 ATP. Total NADPH required = 6 2 = 12 NADPH. Answer: 18 ATP and 12 NADPH
Related: Botany — Photosynthesis in Higher Plants · All PYQ Banks