Tonoplast is a membrane surrounding the

Options

A. cytoplasm
B. vacuole
C. nucleus
D. Mitochondrioa

Answer

**Step-by-Step Solution:**

1. **Understanding Tonoplast:**
- The tonoplast is a specific type of membrane found in plant cells. It is crucial to identify what it surrounds.

2. **Identifying the Options:**
- The question provides four options:
A) Cytoplasm
B) Vacuole
C) Nucleus
D) Mitochondria

3. **Analyzing Each Option:**
- **Option A: Cytoplasm** - The cytoplasm is the jelly-like substance within the cell but is not surrounded by the tonoplast.
- **Option B: Vacuole** - The vacuole is an organelle in plant cells that is primarily responsible for storing nutrients and waste products. It is surrounded by the tonoplast.
- **Option C: Nucleus** - The nucleus is surrounded by the nuclear membrane, not the tonoplast.
- **Option D: Mitochondria** - Mitochondria have their own membranes but are not surrounded by the tonoplast.

4. **Conclusion:**
- Based on the analysis, the tonoplast is specifically the membrane that surrounds the vacuole in plant cells. Therefore, the correct answer is **Option B: Vacuole**.

**Final Answer:** The tonoplast is a membrane surrounding the **vacuole** (Option B).

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