Select the wrong statement

Options

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

Answer

To solve the question "Select the wrong statement," we will analyze each of the provided statements regarding biological classification, particularly focusing on bacteria and their characteristics.

### Step-by-Step Solution:

1. **Analyze the First Statement:**
- **Statement:** "Cyanobacteria lacks flagellated cells."
- **Evaluation:** This statement is correct. Cyanobacteria do not have flagella; they move through gliding and sliding movements.

2. **Analyze the Second Statement:**
- **Statement:** "Mycoplasma is a wall-less microorganism."
- **Evaluation:** This statement is also correct. Mycoplasma is a genus of bacteria that is known for lacking a cell wall.

3. **Analyze the Third Statement:**
- **Statement:** "Bacterial cell wall is made up of peptidoglycan."
- **Evaluation:** This statement is correct. The cell wall of bacteria is primarily composed of peptidoglycan, which is also known as murine.

4. **Analyze the Fourth Statement:**
- **Statement:** "Pili and fimbriae are mainly involved in motility of bacterial cells."
- **Evaluation:** This statement is incorrect. While pili and fimbriae are important for attachment and conjugation, they are not primarily responsible for the motility of bacterial cells. Flagella are the structures that facilitate movement.

### Conclusion:
The wrong statement among the options provided is the fourth one: "Pili and fimbriae are mainly involved in motility of bacterial cells."

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