The site of photosynthesis is

Options

A. Leaves
B. Stem cells
C. Plants
D. Chloroplasts

Answer

**Step-by-Step Solution:**

1. **Understanding Photosynthesis**: Photosynthesis is the process by which plants convert light energy into chemical energy, specifically in the form of carbohydrates.

2. **Identifying the Organism**: This process occurs in plants, which utilize sunlight, carbon dioxide, and water to produce glucose and oxygen.

3. **Key Components Involved**: The main components involved in photosynthesis are sunlight, carbon dioxide (CO2), water (H2O), and chlorophyll (the green pigment in plants).

4. **Location of Photosynthesis**: The site of photosynthesis is the chloroplast, an organelle found in the cells of green plants.

5. **Structure of Chloroplast**: The chloroplast has a double membrane and contains two main parts:
- **Stroma**: The liquid part of the chloroplast where the dark reactions (Calvin cycle) occur.
- **Grana**: The stacked disc-like structures where the light reactions take place.

6. **Types of Reactions**:
- **Light Reactions**: These occur in the grana and involve the absorption of sunlight to produce energy-rich compounds.
- **Dark Reactions**: These occur in the stroma and involve the fixation of carbon dioxide to form glucose.

7. **Conclusion**: Therefore, the site of photosynthesis is the chloroplast, where both light and dark reactions occur.

**Final Answer**: The site of photosynthesis is the chloroplast.

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