Water channel consists of how many types of aquaporins

Options

A. 1
B. 84
C. 8
D. 9

Answer

To answer the question about how many types of aquaporins are present in a water channel, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Water Channels**:
- Water channels are specialized structures in cell membranes that facilitate the movement of water across the membrane.

2. **Identifying Aquaporins**:
- Aquaporins are specific proteins that form these water channels. They allow water to pass through the cell membrane efficiently.

3. **Number of Aquaporins in a Water Channel**:
- Each water channel is composed of a total of 8 different types of aquaporins.

4. **Distinct Structures of Aquaporins**:
- It is important to note that these 8 aquaporins are not identical; they have different structures and functions, which contribute to the overall functionality of the water channel.

5. **Conclusion**:
- Therefore, the correct answer to the question is that a water channel consists of 8 types of aquaporins.

### Final Answer:
A water channel consists of **8 types of aquaporins**.

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