The pressure exerted by wall of the cell on the protoplast is

Options

A. W.P.
B. T.P.
C. D.P.
D. O.P.

Answer

To solve the question regarding the pressure exerted by the wall of the cell on the protoplast, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Protoplast**: The protoplast is the living part of the cell, which includes the cytoplasm and the nucleus, surrounded by the cell wall.

2. **Identifying the Types of Pressure**:
- **Turgor Pressure (TP)**: This is the pressure exerted by the fluid (cytoplasm) against the cell wall. It results from the osmotic movement of water into the cell.
- **Osmotic Pressure (OP)**: This is the pressure required to prevent the flow of water across a semipermeable membrane due to osmosis.
- **Wall Pressure (WP)**: This is the pressure exerted by the cell wall on the protoplast. It acts in opposition to turgor pressure.
- **Dew Point Pressure (DWP)**: This term is not relevant in the context of cell biology.

3. **Analyzing the Question**: The question specifically asks for the pressure exerted by the wall of the cell on the protoplast.

4. **Identifying the Correct Answer**: The pressure exerted by the cell wall on the protoplast is known as Wall Pressure (WP). This pressure is crucial as it helps maintain the structure of the cell by counteracting turgor pressure.

5. **Conclusion**: Therefore, the correct answer to the question is **D) WP (Wall Pressure)**.

### Final Answer:
The pressure exerted by the wall of the cell on the protoplast is **Wall Pressure (WP)**.

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