The bacterial cell wall is composed of :

Options

A. peptidoglycan
B. lignin
C. suberin
D. cellulose

Explanation

**Step-by-Step Solution:**

1. **Understanding the Cell Wall**: The cell wall is an important structure found in many types of cells, providing support and protection. It is located just outside the cell membrane.

2. **Function of the Cell Wall**: The primary functions of the cell wall include providing structural support, protection from environmental stresses, and acting as a filtering mechanism.

3. **Composition of the Bacterial Cell Wall**: In bacteria, the cell wall is specifically composed of a substance known as peptidoglycan.

4. **Details about Peptidoglycan**: Peptidoglycan is a complex structure made up of polymeric carbohydrates and amino acids. It forms a rigid layer that surrounds the cytoplasmic membrane of both gram-positive and gram-negative bacteria.

5. **Conclusion**: Therefore, the bacterial cell wall is composed of peptidoglycan.

**Final Answer**: The bacterial cell wall is composed of peptidoglycan.

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