The `F_1 and F_0` headpiece is a ………..and ………

Options

A. integral membrane steroidal complex and peripheral membrane steroidal complex.
B. integral membrane lipid complex and peripheral membrane lipid complex.
C. integral membrane protein complex and peripheral membrane protein complex.
D. peripheral membrane protein complex and integral membrane protein complex.

Answer

To solve the question regarding the F1 and F0 headpiece, we need to understand the context in which these terms are used. F1 and F0 refer to components of ATP synthase, which is crucial in the process of oxidative phosphorylation in cellular respiration.

### Step-by-Step Solution:

1. **Identify F1 and F0**:
- F1 and F0 are parts of the ATP synthase enzyme complex found in the inner mitochondrial membrane.
- F1 is the catalytic part that synthesizes ATP, while F0 is embedded in the membrane and is responsible for proton translocation.

2. **Determine the Nature of F1 and F0**:
- F0 is an integral membrane protein complex that forms a channel through which protons pass.
- F1 is a peripheral membrane protein complex that protrudes into the mitochondrial matrix and is involved in ATP synthesis.

3. **Classify the Components**:
- F0 is classified as an integral membrane protein complex because it spans the membrane.
- F1 is classified as a peripheral membrane protein complex because it is associated with the membrane but does not span it.

4. **Conclusion**:
- Therefore, the F1 and F0 headpiece is an **integral membrane protein complex** and **peripheral membrane protein complex**.

### Final Answer:
The F1 and F0 headpiece is an **integral membrane protein complex** and **peripheral membrane protein complex**.

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