ATP ase form which complex of ETC?

Options

A. complex I
B. complex III
C. complex IV
D. complex V

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which complex of the Electron Transport Chain (ETC) is formed by ATPase.

2. **Identifying the Components of ETC**: The Electron Transport Chain consists of five main complexes located in the inner mitochondrial membrane. These complexes are responsible for transferring electrons and generating ATP.

3. **Listing the Complexes**:
- **Complex I**: NADH dehydrogenase
- **Complex II**: FADH2
- **Complex III**: Cytochrome BC1 complex
- **Complex IV**: Cytochrome C oxidase
- **Complex V**: ATP synthase (ATPase)

4. **Analyzing Each Complex**:
- **Complex I**: Involved in the oxidation of NADH, not ATPase.
- **Complex II**: Involved in the oxidation of FADH2, not ATPase.
- **Complex III**: Cytochrome BC1 complex, not ATPase.
- **Complex IV**: Cytochrome C oxidase, which is involved in the reduction of oxygen, not ATPase.
- **Complex V**: This is where ATPase, also known as ATP synthase, is located. It is responsible for synthesizing ATP from ADP and inorganic phosphate.

5. **Conclusion**: ATPase is formed by Complex V of the Electron Transport Chain.

**Final Answer**: ATPase forms Complex V of the Electron Transport Chain.

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