Answer: Malic acid.
- A Starch grains
- B Malic acid
- C Pyruvic acid
- D Glucose sugar
Correct answer: B. Malic acid
Explanation: CAM plants fix night-time CO<sub>2</sub> into malic acid, stored in vacuoles, and release it by day for the Calvin cycle.
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.