What maintains the shape of a cell ?

Options

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

Answer

To answer the question "What maintains the shape of a cell?", we can break down the solution into the following steps:

### Step-by-Step Solution:

1. **Understanding Cell Structure**:
- Cells have a defined shape due to their internal and external structures. The cell membrane and cell wall (in plant cells) play a crucial role in maintaining this shape.

2. **Identifying Relevant Pressures**:
- There are several types of pressures that can influence the shape of a cell:
- **Osmotic Pressure**: This is the pressure required to prevent the flow of water across a semipermeable membrane. It is not directly responsible for maintaining cell shape.
- **Turgor Pressure**: This is the pressure exerted by the fluid (usually water) inside the cell against the cell wall. It is crucial for maintaining the shape of plant cells.
- **Suction Pressure**: This refers to the pressure that helps in the movement of water but does not maintain cell shape.
- **Wall Pressure**: This is the pressure exerted by the cell wall on the contents of the cell, but it is not the primary factor maintaining the cell's shape.

3. **Conclusion**:
- Among the pressures discussed, **turgor pressure** is the most significant in maintaining the shape of a cell, especially in plant cells. It pushes the plasma membrane against the cell wall, providing structural support and rigidity.

### Final Answer:
Turgor pressure maintains the shape of a cell.

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