How many number of `CO_(2)` molecules are required to synthesise one molecule of glucose during `C_(3)` cycle?

Options

A. One
B. Three
C. Six
D. Five

Explanation

To determine how many molecules of carbon dioxide (CO₂) are required to synthesize one molecule of glucose (C₆H₁₂O₆) during the C₃ cycle (Calvin cycle), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Glucose**:
- Glucose has the chemical formula C₆H₁₂O₆, which indicates that it contains 6 carbon atoms.

2. **Identify the Role of CO₂ in Photosynthesis**:
- During photosynthesis, carbon dioxide (CO₂) is the source of carbon for the formation of glucose. Each CO₂ molecule contributes one carbon atom.

3. **Calculate the Number of CO₂ Molecules Needed**:
- Since each glucose molecule requires 6 carbon atoms, and each CO₂ molecule provides 1 carbon atom, we need 6 CO₂ molecules to provide the necessary 6 carbon atoms for one glucose molecule.

4. **Conclusion**:
- Therefore, to synthesize one molecule of glucose during the C₃ cycle, **6 molecules of CO₂ are required**.

### Final Answer:
The number of CO₂ molecules required to synthesize one molecule of glucose during the C₃ cycle is **6**.

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