Answer: Chlorophyll a.
- A Chlorophyll b
- B Chlorophyll a
- C Beta carotene
- D Xanthophyll
Correct answer: B. Chlorophyll a
Explanation: The reaction centres of PS I and PS II are special chlorophyll a molecules (P700 and P680).
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.