The structure which prevents the bacteria from bursting or collapsing is

Options

A. Cell wall
B. Glycocalyx
C. Cell membrane
D. Mesosomes

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the structure that prevents bacteria from bursting or collapsing. This indicates we are looking for a protective structure.

2. **Analyzing the Options**:
- **Mesosomes**: These are invaginations of the plasma membrane that assist in respiration and distribution of genetic material but do not provide structural protection against bursting or collapsing.
- **Cell Membrane**: This is a fragile structure that primarily regulates the entry and exit of substances but does not provide significant protection against mechanical stress.
- **Glycocalyx**: This is a thick outer covering composed of sugars and proteins. While it helps in cell adhesion and provides some protection, it is not the primary structure responsible for preventing bursting or collapsing.
- **Cell Wall**: This is a rigid structure that surrounds the plasma membrane in bacteria. It provides mechanical support and protection against osmotic pressure, preventing the cell from bursting when internal pressure is high.

3. **Conclusion**: Based on the analysis, the structure that prevents bacteria from bursting or collapsing is the **cell wall**. It offers mechanical protection and controls the passage of molecules, ensuring the cell maintains its integrity under varying conditions.

4. **Final Answer**: The structure which prevents the bacteria from bursting or collapsing is the **cell wall**.

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