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 of selecting the wrong statement, we will analyze each of the provided statements one by one.

### Step-by-Step Solution:

1. **Statement 1: "Cyanobacteria lack flagellated cells."**
- **Analysis:** Cyanobacteria are known to be photosynthetic bacteria. They typically do not have flagella, which are used for movement. Therefore, this statement is correct.

2. **Statement 2: "Mycoplasma is a wall-less microorganism."**
- **Analysis:** Mycoplasma are indeed unique among bacteria because they lack a cell wall. This characteristic allows them to be flexible and resistant to certain antibiotics that target cell wall synthesis. Hence, this statement is also correct.

3. **Statement 3: "Bacterial cell wall is made up of peptidoglycan."**
- **Analysis:** The cell wall of bacteria is primarily composed of peptidoglycan, which provides structural support and protection. This statement is accurate.

4. **Statement 4: "Pili and Fimbriae are mainly involved in the motility of bacterial cells."**
- **Analysis:** Pili and fimbriae are hair-like structures on the surface of bacteria. They are primarily involved in attachment to surfaces and other cells, not in motility. The main structures involved in bacterial motility are flagella. Therefore, this statement is incorrect.

### Conclusion:
The wrong statement among the options given is **Statement 4**: "Pili and Fimbriae are mainly involved in the motility of bacterial cells."

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