Bacteria with tuft of flagella at one pole is known as

Options

A. Amphitrichous
B. Peritrichous
C. Atrichous
D. Lophotrichous

Answer

To answer the question "Bacteria with tuft of flagella at one pole is known as," we can follow these steps:

### Step-by-Step Solution:

1. **Understand Flagella Arrangement**: Bacteria can have different arrangements of flagella, which are tail-like structures used for movement. The arrangement of flagella is crucial for classifying bacteria.

2. **Identify Types of Flagellation**:
- **Amphitrichous**: This type has a tuft of flagella at both ends of the bacterial cell.
- **Peritrichous**: In this arrangement, flagella are distributed all over the surface of the bacterium.
- **Atrichous**: This refers to bacteria that do not have any flagella.
- **Lophotrichous**: This type has a tuft or cluster of flagella at one end of the bacterium.

3. **Focus on the Question**: The question specifically asks for bacteria that have a tuft of flagella at one pole.

4. **Select the Correct Type**: Based on the definitions, the type of bacteria that fits the description of having a tuft of flagella at one pole is **Lophotrichous**.

5. **Conclusion**: Therefore, bacteria with a tuft of flagella at one pole are known as **Lophotrichous bacteria**.

### Final Answer:
Bacteria with tuft of flagella at one pole is known as **Lophotrichous**.

---