Answer: 12.
- A 12
- B 6
- C 3
- D 24
Correct answer: A. 12
Explanation: Splitting 2 H₂O gives 1 O₂, so 6 O₂ requires 12 water molecules.
Simplified photosynthesis diagram: light energy, CO2, and H2O enter the leaf and are converted in the chloroplast into glucose and O2.
Concept context
Light reactions, the Calvin cycle, C 3 /C 4 /CAM pathways, photorespiration, and factors affecting the rate of photosynthesis. One of the highest-yield NEET chapters.