- A Split water molecules at the oxygen-evolving complex of Photosystem II
- B Synthesize new chlorophyll pigment molecules within the thylakoid membrane
- C Reduce CO2 to produce G3P (glyceraldehyde-3-phosphate)
- D Produce molecular oxygen released as a byproduct of water oxidation
Correct answer: C. Reduce CO2 to produce G3P (glyceraldehyde-3-phosphate)
Explanation: Calvin cycle: ATP and NADPH (from light reactions) provide energy and electrons to convert CO2 into G3P, which is used to make sugars.
Concept context
Light reactions, the Calvin cycle, C3/C4/CAM pathways, photorespiration, and factors affecting the rate of photosynthesis. One of the highest-yield NEET chapters.