Which is not true of bacterial cell wall ?

Options

A. Not antigenic
B. Provides shape to bacterium
C. stainable with simple dyes
D. Made of mucopeptide.

Answer

To determine which statement about the bacterial cell wall is not true, we can analyze the characteristics of the bacterial cell wall based on the information provided.

### Step-by-Step Solution:

1. **Understanding the Structure of the Bacterial Cell Wall**:
- The bacterial cell wall is a rigid outer covering that lies between the plasma membrane and the glycocalyx.

2. **Function of the Bacterial Cell Wall**:
- It provides shape and structural support to the bacterium.
- It protects the bacteria from bursting in a hypertonic solution and collapsing in a hypotonic solution.

3. **Analyzing the Statements**:
- **Statement 1**: "The bacterial cell wall is not antigenic."
- This is true. The cell wall itself does not induce antibody formation; that role is performed by the glycocalyx.
- **Statement 2**: "The bacterial cell wall protects against osmotic pressure."
- This is also true, as discussed earlier.
- **Statement 3**: "The bacterial cell wall is stainable with simple dyes."
- This is not true. The bacterial cell wall requires special dyes (like Gram stain) for staining, not simple dyes.
- **Statement 4**: "The bacterial cell wall is made up of mucopeptide."
- This is true, as the cell wall is composed of peptidoglycan, which is a type of mucopeptide.

4. **Conclusion**:
- The statement that is not true about the bacterial cell wall is **Statement 3**, which claims that it is stainable with simple dyes.

### Final Answer:
The statement that is not true of the bacterial cell wall is: **"The bacterial cell wall is stainable with simple dyes."**

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