The Pressure exerted by the swelling protoplast on the walls of the cell is

Options

A. Wall pressure
B. Osmotic pressure
C. Suction pressure
D. Turgor pressure .

Answer

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

### Step-by-Step Solution:

1. **Understanding the Components**:
- The protoplast is the living part of the plant cell, which includes the cytoplasm, nucleus, and other organelles, but excludes the cell wall.
- The cell wall is a rigid structure that surrounds the protoplast.

2. **Identifying the Types of Pressure**:
- **Wall Pressure**: This is the pressure exerted by the cell wall on the protoplast. It acts in the opposite direction to turgor pressure.
- **Osmotic Pressure**: This is the pressure required to prevent the flow of water across a semipermeable membrane due to osmosis. It is not directly related to the pressure exerted by the protoplast.
- **Suction Pressure**: This refers to the pressure that helps in the absorption of water by the cell, but it is not the pressure exerted by the protoplast on the cell wall.
- **Turgor Pressure**: This is the pressure exerted by the swelling protoplast against the cell wall. It is a result of water entering the cell, causing the protoplast to swell and press against the cell wall.

3. **Determining the Correct Answer**:
- Since the question specifically asks about the pressure exerted by the swelling protoplast on the walls of the cell, the correct term is **turgor pressure**.
- Turgor pressure is crucial for maintaining cell structure and rigidity in plant cells.

4. **Conclusion**:
- Therefore, the answer to the question is **option D: turgor pressure**.