MCQ on CAM Cycle (Crassulacean Acid Metabolism)







The CAM (Crassulacean Acid Metabolism) cycle is a photosynthetic adaptation in some plants allowing them to fix CO₂ at night, storing it as malic acid. During the day, CO₂ is released for photosynthesis. This conserves water, making it ideal for arid environments. This is an MCQ on CAM Cycle with Answer Key.

1. 
What does CAM in CAM cycle stand for?

2. 
Which type of plants primarily use the CAM cycle?

3. 
During what time of day do CAM plants open their stomata?

4. 
What is the primary benefit of the CAM cycle for plants in arid environments?

5. 
Which acid is primarily accumulated in the vacuoles of CAM plants during the night?

6. 
What happens to the malic acid accumulated during the night in CAM plants?

7. 
Which enzyme is responsible for the initial fixation of CO2 in CAM plants?

8. 
In CAM plants, when does the Calvin cycle primarily take place?

9. 
What is a key difference between C4 and CAM plants regarding the timing of CO2 fixation?

10. 
Which of the following is an example of a CAM plant?



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