For formation of 1 glucose molecule , number of Calvin cycle occur are

Options

A. 8 times
B. 6 times
C. 4 times
D. 2 times

Answer

To determine the number of Calvin cycle turns required for the formation of one glucose molecule, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Calvin Cycle**: The Calvin cycle, also known as the C3 cycle, is a process in photosynthesis where carbon dioxide is fixed into organic molecules. It consists of three main stages: carboxylation, reduction, and regeneration.

2. **Carbon Fixation**: Each turn of the Calvin cycle fixes one molecule of carbon dioxide. Since glucose (C6H12O6) is a hexose sugar, it requires six carbon atoms for its formation.

3. **Calculating the Number of Turns**: To form one glucose molecule, which contains six carbon atoms, the Calvin cycle must turn six times. This is because each turn of the cycle incorporates one carbon atom from carbon dioxide.

4. **Conclusion**: Therefore, to produce one molecule of glucose, the Calvin cycle must occur **6 times**.

### Final Answer:
The number of Calvin cycle turns required for the formation of one glucose molecule is **6 times**.

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