Which of the following observations most strongly support the view that mitochondria contain transport enzymes aggregated into compact association ?

Options

A. Mitochondria have a highly folded inner wall.
B. Disruption of mitochondria yields membrane fragments, which are able to synthesies ATP.
C. A contractile protein capable of utilising ATP has been obtained from mitochondria.
D. Mitochondria in animal embryos have a tendency to concentrate in cells, which are to become locomotory structures.

Answer

To determine which observation most strongly supports the view that mitochondria contain transport enzymes aggregated into compact associations, we can analyze the provided options step by step.

### Step-by-Step Solution:

1. **Understanding Mitochondria Structure**: Mitochondria are known as the powerhouse of the cell and have a unique structure, including an outer membrane and a highly folded inner membrane known as cristae. The folds increase the surface area for biochemical reactions.

2. **Evaluating the Options**:
- **Option 1**: "Mitochondria have a highly folded inner wall."
- While this is true, it does not directly support the idea of transport enzymes being aggregated into compact associations. The folding increases surface area but does not provide evidence of enzyme aggregation.

- **Option 2**: "Disruption of mitochondria yields membrane fragments which are able to synthesize ATP."
- This option suggests that even when mitochondria are disrupted, the fragments can still synthesize ATP. This indicates that the enzymes responsible for ATP synthesis (like ATPase) are present in these membrane fragments, supporting the idea that these enzymes are aggregated in a compact manner within the mitochondrial membrane.

- **Option 3**: "A contractile protein capable of utilizing ATP has been obtained from mitochondria."
- This statement does not directly relate to transport enzymes or their aggregation. It merely states that a protein that uses ATP can be found in mitochondria, which does not support the specific view in question.

- **Option 4**: "Mitochondria in animal embryos have the tendency to concentrate in cells which are able to become locomotory structures."
- This observation is about the location of mitochondria and does not provide any information about the presence or aggregation of transport enzymes.

3. **Conclusion**: After analyzing all options, **Option 2** is the most supportive of the view that mitochondria contain transport enzymes aggregated into compact associations. The ability of membrane fragments to synthesize ATP after disruption indicates that the necessary enzymes are indeed compactly associated within the mitochondrial structure.

### Final Answer:
**Option 2**: Disruption of mitochondria yields membrane fragments which are able to synthesize ATP.

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