How many Calvin cycle form one hexose molecule

Options

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

Answer

To determine how many Calvin cycles are needed to form one hexose molecule, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Calvin Cycle**: The Calvin cycle is a series of biochemical reactions that take place in the stroma of chloroplasts during photosynthesis. It is also known as the dark reaction or light-independent reaction.

2. **Identify the Product**: The question asks about the formation of one hexose molecule. A hexose is a six-carbon sugar, such as glucose.

3. **Carbon Fixation**: Each turn of the Calvin cycle fixes one molecule of carbon dioxide (CO2).

4. **Calculate the Number of Turns**: Since a hexose sugar contains six carbon atoms, we need to fix six molecules of CO2 to produce one hexose molecule.

5. **Conclusion**: Therefore, to produce one hexose molecule, 6 turns of the Calvin cycle are required.

### Final Answer:
6 turns of the Calvin cycle are needed to form one hexose molecule.

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