Site of oxidative phosphorylation is

Options

A. Ribosomes
B. Golgi apparatus
C. Mitochondria
D. Endoplasmic reticulum

Explanation

**Step-by-Step Solution:**

1. **Understanding Oxidative Phosphorylation**:
- Oxidative phosphorylation is a metabolic process that occurs in cells, primarily responsible for producing ATP (adenosine triphosphate), the energy currency of the cell.

2. **Identifying Key Terms**:
- The term "oxidative" refers to oxidation reactions, which involve the transfer of electrons, while "phosphorylation" refers to the addition of a phosphate group to ADP (adenosine diphosphate) to form ATP.

3. **Locating the Site of the Process**:
- The question asks for the site where oxidative phosphorylation occurs. The options given are ribosomes, Golgi apparatus, mitochondria, and endoplasmic reticulum.

4. **Analyzing Each Option**:
- **Ribosomes**: These are involved in protein synthesis, not in ATP production.
- **Golgi Apparatus**: This organelle is responsible for packaging proteins and lipids, not for ATP production.
- **Endoplasmic Reticulum**: This organelle is involved in the synthesis of proteins and lipids, but it does not produce ATP.
- **Mitochondria**: Known as the "powerhouse of the cell," mitochondria are the organelles where oxidative phosphorylation occurs, leading to ATP production through redox reactions.

5. **Conclusion**:
- The site of oxidative phosphorylation is the **mitochondria**.

**Final Answer**: The site of oxidative phosphorylation is the mitochondria.

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