The______are small bristle like fibres sprouting out of the bacterial cell.

Options

A. pili
B. Mesosomes
C. Cilia
D. Fimbriae

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:**
The question asks for the name of small bristle-like fibers that sprout out of bacterial cells.

2. **Identifying the Options:**
The options provided are:
- A) Pili
- B) Mesosomes
- C) Cilia
- D) Fimbri

3. **Analyzing Each Option:**
- **Option A: Pili**
- Pili are hair-like appendages found on the surface of bacteria. They are primarily involved in bacterial conjugation (the exchange of genetic material between bacteria). However, they are not specifically described as bristle-like fibers.

- **Option B: Mesosomes**
- Mesosomes are extensions of the plasma membrane into the cell wall of bacteria. They are involved in processes like DNA replication. They do not fit the description of bristle-like fibers.

- **Option C: Cilia**
- Cilia are hair-like structures found in eukaryotic cells, not in bacteria. Thus, this option is incorrect.

- **Option D: Fimbri**
- Fimbri are indeed small bristle-like fibers that sprout from bacterial cells. They play a role in the adhesion of bacteria to surfaces and can assist in agglutination processes.

4. **Conclusion:**
After analyzing all options, the correct answer is **D) Fimbri**.

**Final Answer:**
The small bristle-like fibers sprouting out of the bacterial cell are called **Fimbri**.

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