Question

The prokaryotic flagella possess

(a) unit membrane enclosed fibre

(b) protein membrane enclosed fibre

(c) '9+ 2' membrane enclosed structure

(d) helically arranged protein molecule

Answer 1

Correct option (d) helically arranged protein molecule

Explanation:

Prokaryotic (bacterial) flagellum is made up of flagellin protein arranged helically. It do not show 9+2 organisation and ATPase activity. These flagella do not beat but rotate like a propellar that brings about backward pushing of water. Gram +ve bacteria having two rings in the basal body. Gram -ve bacteria have four rings. The L, P, M and S rings.