Answer: Oxygen.
- A Oxygen
- B Glucose
- C Nitrogen
- D Ammonia
Correct answer: A. Oxygen
Explanation: Splitting water yields H<sup>+</sup> ions, electrons for the reaction centre, and O<sub>2</sub> as a by-product.
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.