Biology : PU-CET (U.G) 2015 Panjab University Entrance Exam With Answers

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6.

Bacteria With Flagella All Around The Periphery Of Cell Is Called :

A: Peritrichous

B: Monotrichous

C: Lophotrichous

D: Amphitrichous

The answer is: A

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Explanation

Bacteria with flagella all around the periphery of the cell is called peritrichous.

"Peri" means around and "trichous" refers to hair-like structures, which in this case, are flagella. So peritrichous bacteria have multiple flagella distributed all around the cell surface.

Monotrichous bacteria have a single flagellum at one end of the cell, while lophotrichous bacteria have multiple flagella at one or both ends of the cell. Amphitrichous bacteria have a single flagellum at each end of the cell.