The one located inside a vacuole is

Options

A. Tonoplast
B. Matrix
C. Ergastic substances
D. Cell sap

Answer

To answer the question "The one located inside a vacuole is:", we will analyze the options provided and determine which one is correct based on our understanding of vacuoles in plant cells.

### Step-by-Step Solution:

1. **Understanding Vacuoles**:
- Vacuoles are membrane-bound organelles found in plant cells. They play a crucial role in storing various substances.

2. **Identifying the Contents of Vacuoles**:
- The primary component found inside vacuoles is known as "cell sap". This is a fluid that contains water, inorganic ions, and organic molecules.

3. **Reviewing the Options**:
- **Option A: Tonoplast**: This is the membrane that surrounds the vacuole, not something found inside it. Therefore, this option is incorrect.
- **Option B: Matrix**: This term generally refers to the internal environment of organelles like mitochondria, but it is not a term used to describe contents of vacuoles. Thus, this option is also incorrect.
- **Option C: Ergastic substances**: These are non-living substances found in the cytoplasm, such as tannins and resins. They do not refer to the contents of vacuoles, making this option incorrect as well.
- **Option D: Cell sap**: This is indeed the fluid found inside the vacuole, containing water and various dissolved substances. Therefore, this option is correct.

4. **Conclusion**:
- The correct answer to the question is **Cell Sap**, which is located inside the vacuole.

### Final Answer:
The one located inside a vacuole is **Cell Sap**.

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