- A ATP synthesis
- B CO2 fixation: CO2 + RuBP → 2 PGA
- C Sugar to starch conversion
- D Electron transfer
Correct answer: B. CO2 fixation: CO2 + RuBP → 2 PGA
Explanation: Rubisco (RuBisCO = ribulose bisphosphate carboxylase/oxygenase) catalyzes fixation of CO2 onto RuBP to form 2 molecules of 3-PGA.
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.