Select the wrong statement

Options

A. Bacterial cellwall is made up of peptidoglycan
B. Pili and fimbriae are mainly involved in motility of bacterial cells
C. Cyanobacteria lack flagellated cells
D. Mycoplasma is a wall less microorganism

Answer

To solve the question of selecting the wrong statement, we will analyze each of the provided options step by step.

### Step-by-Step Solution:

1. **Analyze the First Statement:**
- **Statement:** "Bacterial cell wall is made up of peptidoglycan."
- **Evaluation:** This statement is **correct**. The cell wall of bacteria is indeed composed of peptidoglycan, which is a polymer made from N-acetylglucosamine and N-acetylmuramic acid.

2. **Analyze the Second Statement:**
- **Statement:** "Pilae and Fimbrae are involved in the motility of bacterial cells."
- **Evaluation:** This statement is **incorrect**. Pilae (or pili) and fimbrae are primarily involved in adhesion to surfaces rather than motility. They are thin protein structures that help bacteria attach to surfaces, and while they may play a minor role in movement, they are not the main structures responsible for motility.

3. **Analyze the Third Statement:**
- **Statement:** "Cyanobacteria lack flagellated cells."
- **Evaluation:** This statement is **correct**. Cyanobacteria are generally non-motile and do not have flagella, which are structures used for movement.

4. **Analyze the Fourth Statement:**
- **Statement:** "Mycoplasma is a wall-less microorganism."
- **Evaluation:** This statement is **correct**. Mycoplasma are unique among bacteria in that they lack a cell wall, which makes them resistant to antibiotics that target cell wall synthesis.

### Conclusion:
After evaluating all the statements, the **wrong statement** is the second one: "Pilae and Fimbrae are involved in the motility of bacterial cells."

### Final Answer:
The wrong statement is **option 2**.

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