Bacteria cell wall is composed of

Options

A. Lipid
B. Cellulose
C. Chitin
D. Mucopeptide// Peptidoglycan.

Answer

### Step-by-Step Solution

1. **Understanding the Question**: The question asks about the composition of the bacterial cell wall.

2. **Analyzing the Options**: We have four options to consider:
- A) Lipid
- B) Cellulose
- C) Chitin
- D) Mucopeptide (Peptidoglycan)

3. **Evaluating Each Option**:
- **Option A: Lipid**: Bacterial cell walls are not composed of lipids. Therefore, this option is incorrect.
- **Option B: Cellulose**: Cellulose is found in plant cell walls, not in bacteria. Thus, this option is also incorrect.
- **Option C: Chitin**: Chitin is a component of fungal cell walls, not bacterial. Hence, this option is incorrect as well.
- **Option D: Mucopeptide (Peptidoglycan)**: This is the correct option. Bacterial cell walls are primarily composed of peptidoglycan, which provides structural support and protection.

4. **Conclusion**: After evaluating all options, the correct answer is that the bacterial cell wall is composed of mucopeptide, also known as peptidoglycan.

### Final Answer
The bacterial cell wall is composed of **mucopeptide (peptidoglycan)**.

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