The process of oxidative phosphorylation takes place in

Options

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

Answer

**Step-by-Step Solution:**

1. **Understanding Oxidative Phosphorylation**: First, we need to understand what oxidative phosphorylation is. It is a process that occurs in cells where ATP (adenosine triphosphate) is produced from ADP (adenosine diphosphate) and inorganic phosphate, using energy derived from the oxidation of reduced coenzymes.

2. **Identifying the Location**: The question asks where this process takes place. The options provided are mitochondria, chloroplasts, ribosomes, or cytoplasm.

3. **Role of Mitochondria**: The mitochondria are known as the powerhouses of the cell. They are the sites of cellular respiration, where energy production occurs. The Krebs cycle, which generates reduced coenzymes like NADH2 and FADH2, takes place in the mitochondria.

4. **Oxidation of Reduced Coenzymes**: During oxidative phosphorylation, the reduced coenzymes (NADH2 and FADH2) produced in the Krebs cycle are oxidized. This oxidation process occurs in the inner mitochondrial membrane, where ATP is synthesized.

5. **Conclusion**: Based on the above points, we conclude that oxidative phosphorylation takes place in the mitochondria.

**Final Answer**: The process of oxidative phosphorylation takes place in the mitochondria.

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