The infoldings of the inner membrane of the cell organelle concerned with aerobic respiration

Options

A. cristae
B. mesosomes
C. vesicles
D. cisternae

Answer

### Step-by-Step Solution:

1. **Identify the Organelle Involved in Aerobic Respiration**:
- The cell organelle that is primarily responsible for aerobic respiration is the **mitochondria**.

2. **Understand the Structure of Mitochondria**:
- Mitochondria are double membrane-bound organelles, consisting of an outer membrane and an inner membrane.

3. **Focus on the Inner Membrane**:
- The inner membrane of the mitochondria is highly folded. These folds are known as **cristae**.

4. **Function of Cristae**:
- The cristae increase the surface area of the inner membrane, which is crucial because it is where the enzymes involved in aerobic respiration are located. This increased surface area allows for more efficient ATP production.

5. **Conclusion**:
- Therefore, the infoldings of the inner membrane of the mitochondria, known as cristae, are directly related to the process of aerobic respiration.

### Final Answer:
The infoldings of the inner membrane of the cell organelle concerned with aerobic respiration are called **cristae**, which are found in the mitochondria.

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