Bacteria having a tuft of flagella at one end are called

Options

A. Peritrichous
B. Monotrichous
C. Lophtrichous
D. Amphitrichous.

Answer

To solve the question "Bacteria having a tuft of flagella at one end are called," we need to understand the different types of flagellation in bacteria. Here’s a step-by-step breakdown:

### Step 1: Understand the Types of Flagellation
Bacteria can have different arrangements of flagella, which are important for their movement. The four main types of flagellation are:
1. **Monotrichous**: A single flagellum at one end.
2. **Amphitrichous**: A single flagellum at both ends.
3. **Lophotrichous**: A tuft (or group) of flagella at one end or both ends.
4. **Peritrichous**: Flagella distributed all over the surface of the cell.

### Step 2: Analyze the Question
The question specifically asks for bacteria that have a tuft of flagella at one end. This means we are looking for a type of flagellation where multiple flagella are grouped together at a single location on the bacterial cell.

### Step 3: Identify the Correct Type
From our understanding of the types of flagellation:
- **Monotrichous** is incorrect because it only has one flagellum.
- **Amphitrichous** is incorrect because it has flagella at both ends.
- **Peritrichous** is incorrect as it has flagella all over the cell.
- **Lophotrichous** is correct because it describes bacteria that have a tuft of flagella at one end.

### Conclusion
Therefore, the correct answer to the question is **Lophotrichous**.

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