Aquaporin density is more on

Options

A. Tonoplasm
B. Tonoplast
C. Nuclear membrane
D. Thylakoid membrane

Answer

**Step-by-Step Solution:**

1. **Understanding Aquaporins:**
- Aquaporins are specialized proteins that facilitate the movement of water across cell membranes. They are a type of porin but specifically designed for water transport.

2. **Identifying Locations of Aquaporins:**
- Aquaporins are found in various cellular membranes, particularly in plant cells. They are present in the plasma membrane, chloroplasts, and other organelles.

3. **Analyzing the Options:**
- The options provided are: tonoplast, nuclear membrane, and thylakoid membrane.
- **Tonoplast**: This is the membrane surrounding the central vacuole in plant cells.
- **Nuclear membrane**: This surrounds the nucleus and is not primarily associated with water transport.
- **Thylakoid membrane**: This is part of the chloroplast where photosynthesis occurs and is involved in the transport of water.

4. **Determining the Correct Answer:**
- Given that aquaporins facilitate water transport and are abundant in chloroplasts, the thylakoid membrane (which is part of the chloroplast) would have a higher density of aquaporins compared to the other options.
- Therefore, the correct answer is the **thylakoid membrane**.

5. **Conclusion:**
- Aquaporin density is more on the **thylakoid membrane**.

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