Bacteria bearing flagella all over the body are called

1. Peritrichous
2. Monotrichous
3. Atrichous
4. Cephalotrichous

Flagellum is a cellular appendage which is present in prokaryotic and eukaryotic cell. It helps in locomotion and also acts as a sensory organ. Bacteria is divided into several groups on the basis of number and arrangements of flagella.

a) Bacteria bearing flagella all over the body are called peritrichous. For example, Clostridium tetani.

b) Bacteria without are called atrichous. For example, Lactobacillus.

c) Bacteria having a single flagellum at only one pole or end are monotrichous. For example, Vibrio cholerae.

d) Bacteria having a tuft of flagella at one end are called cephalotrichous. For example, Pseudomonas.

So, the correct answer is option A.