Question

Which of the following has peritrichous flagella?

• A. Pseudomonas
• B. Bacillus typhosus
• C. Spirillium
• D. Vibrio

Answer 1

Answer: (B)

Bacillus typhosus

There are four types of flagellar arrangements based on the number and placement of flagella on the cell. These are,

1. Monotrichous - A single flagellum extends from one end of the cell. Example includes Vibrio cholerae.

2. Amphitrichous - A single flagellum or multiple flagella extend from two ends of the cell. Examples include Alkaligens faecalis.

3. Lophotrichous - Tuft of flagella extend from one end or both ends of the cell. Examples include Spirillum.

4. Peritrichous - Multiple flagella randomly distributed over the entire bacterial cell. Example includes Bacillus typhosus.

Thus, the correct answer is 'Bacillus typhosus.'