Complex V in ETC consists of

Options

A. (a) `F_0 - F_1`
B. (b) ATP synthase
C. (c) Both a) and b)
D. (d) Cytochrome C oxidase

Answer

**Step-by-Step Solution:**

1. **Understanding the Electron Transport Chain (ETC):** The Electron Transport Chain is a series of complexes located in the inner mitochondrial membrane. These complexes facilitate the transfer of electrons and protons, ultimately leading to ATP synthesis.

2. **Identifying Complex V:** In the context of the ETC, Complex V is known as ATP synthase. This complex is crucial for the final step of oxidative phosphorylation, where ATP is synthesized from ADP and inorganic phosphate.

3. **Components of ATP Synthase:** ATP synthase consists of two main parts:
- **F1 Part:** This part contains the ATPase enzyme, which catalyzes the synthesis of ATP.
- **F0 Part:** This part forms the proton channel, allowing protons to flow through, which drives the synthesis of ATP.

4. **Function of ATP Synthase:** The ATP synthase complex utilizes the proton gradient established by the previous complexes in the ETC to convert ADP and inorganic phosphate into ATP. This process is called oxidative phosphorylation.

5. **Analyzing the Options:**
- A) F1F0 particle: This refers to ATP synthase, which is correct.
- B) ATP synthase: This is also correct as it directly identifies Complex V.
- C) Both A and B: Since both A and B are correct, this option is valid.
- D) Cytochrome C oxidase: This refers to Complex IV, which is not the answer.

6. **Conclusion:** The correct answer is option C, as both A (F1F0 particle) and B (ATP synthase) describe Complex V in the ETC accurately.

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