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In CAM plants, CO2 acceptor is...

In CAM plants, CO2 acceptor is

A

RuBP

B

PEP

C

OAA

D

PGA

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding CAM Plants**: CAM stands for Crassulacean Acid Metabolism. These plants have a unique way of photosynthesis that allows them to conserve water in arid conditions. 2. **Carbon Fixation Timing**: In CAM plants, carbon fixation occurs at two different times: at night and during the day. 3. **Nighttime Carbon Fixation**: During the night, CAM plants fix carbon dioxide. The CO2 acceptor used at this time is phosphoenolpyruvate (PEP). 4. **Daytime Carbon Fixation**: During the daytime, the carbon dioxide fixation process utilizes ribulose bisphosphate (RuBP) as the CO2 acceptor, which is facilitated by the enzyme Rubisco. 5. **First Stable Product**: The first stable product formed during the nighttime fixation is oxaloacetic acid. 6. **Conclusion**: Therefore, the CO2 acceptor in CAM plants during nighttime is phosphoenolpyruvate (PEP). **Final Answer**: The CO2 acceptor in CAM plants is phosphoenolpyruvate (PEP). ---
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