`ATP` synthetase of chloroplasts is similar to that of

Options

A. Mitochondria
B. Peroxisomes
C. Golgi bodies
D. Microsomes.

Answer

To solve the question regarding the similarity of ATP synthetase in chloroplasts, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the similarity of ATP synthetase in chloroplasts to another structure. We need to identify which of the given options shares the most similarities with chloroplast ATP synthetase.

2. **Review the Options**: The options provided are:
- A) Mitochondria
- B) Peroxisomes
- C) Golgi bodies
- D) Microsomes

3. **Analyze ATP Synthetase**: ATP synthetase is an enzyme complex that synthesizes ATP from ADP and inorganic phosphate using a proton gradient. It is crucial in both chloroplasts and mitochondria.

4. **Identify Similar Structures**:
- **Mitochondria**:
- Both mitochondria and chloroplasts have a double membrane structure.
- They both contain their own DNA (circular DNA) and ribosomes (70S ribosomes).
- Both organelles have an electron transport chain that generates a proton gradient used by ATP synthetase.
- **Peroxisomes, Golgi Bodies, and Microsomes**:
- These structures do not have a similar ATP synthetase mechanism or the same functional role in energy production.

5. **Conclusion**: Based on the similarities in structure, function, and the presence of ATP synthetase, the correct answer is **A) Mitochondria**.

### Final Answer:
The ATP synthetase of chloroplasts is similar to that of **Mitochondria**.

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