MCQ on C3 Cycle (Calvin Cycle)




The Calvin cycle, also known as the C3 cycle, is a process in photosynthesis where carbon dioxide is converted into organic compounds like glucose. It consists of three phases: carbon fixation, reduction, and regeneration of ribulose-1,5-bisphosphate (RuBP). This is an MCQ on C3 Cycle of Photosynthesis.

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1. 
What is the primary function of the C3 cycle in photosynthesis?

2. 
In which cellular compartment does the C3 cycle take place in eukaryotic plant cells?

3. 
During the C3 cycle, carbon dioxide is fixed into a three-carbon compound known as:

4. 
What is the initial carbon fixation enzyme in the C3 cycle?

5. 
What is the primary electron carrier molecule that transfers high-energy electrons during the C3 cycle?

6. 
Which of the following is NOT a product of the C3 cycle?

7. 
The regeneration of ribulose-1,5-bisphosphate (RuBP) is a crucial step in the C3 cycle. How many molecules of ATP are typically required to regenerate one molecule of RuBP?

8. 
During the C3 cycle, which molecule serves as the primary carbon acceptor and combines with carbon dioxide in the presence of RuBisCO?

9. 
Which of the following factors can limit the efficiency of the C3 cycle, especially under high-temperature and low-carbon-dioxide conditions?

10. 
The C3 cycle is essential for the production of organic molecules in plants. What is the primary organic product generated by the C3 cycle that serves as a source of energy and carbon for the plant?

11. 
In some conditions, photorespiration can compete with the C3 cycle, reducing its efficiency. Which photosynthetic pathway aims to minimize photorespiration by concentrating carbon dioxide in specialized cells?

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MCQ on C3 Cycle

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