Calvin cycle occurs in

Options

A. Cytoplasm
B. Mitochondria
C. Glyoxysomes
D. Chloroplasts.

Answer

**Step-by-Step Solution:**

1. **Understanding the Calvin Cycle**: The Calvin cycle, also known as the C3 cycle, is a crucial part of photosynthesis in plants. It is responsible for fixing carbon dioxide and converting it into organic compounds.

2. **Identifying the Location**: The Calvin cycle involves a series of biochemical reactions that occur in specific cellular organelles.

3. **Analyzing the Options**:
- **Cytoplasm**: This is the fluid inside the cell where many metabolic processes occur, but it is not the site for the Calvin cycle.
- **Mitochondria**: These are the powerhouses of the cell, primarily involved in cellular respiration, not photosynthesis.
- **Glyoxysomes**: These organelles are involved in the breakdown of fatty acids and are not related to the Calvin cycle.
- **Chloroplasts**: These are the organelles where photosynthesis takes place, and they contain the stroma, which is the site of the Calvin cycle.

4. **Conclusion**: Since the Calvin cycle occurs in the stroma of chloroplasts, the correct answer is **chloroplasts**.

5. **Final Answer**: The Calvin cycle occurs in **chloroplasts**.

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