MCQ on C4 Cycle (Hatch and Slack pathway)







The C4 cycle (Hatch and Slack Pathway) is a photosynthetic process in some plants where CO₂ is initially fixed into a four-carbon compound. This adaptation minimizes photorespiration and enhances efficiency by concentrating CO₂ around RuBisCO, enabling better performance under high light intensity, high temperatures, and low CO₂ conditions. This is an MCQ on C4 Cycle of Photosynthesis in plants.

1. 
What is the primary advantage of the C4 cycle in plants?

2. 
In which type of cells does the initial fixation of CO2 occur in C4 plants?

3. 
Which enzyme is responsible for the initial fixation of CO2 in the C4 cycle?

4. 
What is the first stable product formed in the C4 cycle?

5. 
What compound is decarboxylated in the bundle sheath cells to release CO2?

6. 
Which of the following plants is an example of a C4 plant?

7. 
Where does the Calvin cycle occur in C4 plants?

8. 
What is the role of PEP carboxylase in the C4 cycle?

9. 
What adaptation allows C4 plants to thrive in high light intensity and high temperatures?

10. 
What happens to the pyruvate formed in the bundle sheath cells after the release of CO2?



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