The spindles are formed of

The motile bacteria are able to move by

The diameter of a microtubule fibre is:

$S$ - Statement: The cytoskeleton is composed of three types of filaments: microfilaments, microtubules, and intermediate filaments.
$R$ - Reason: Microtubules are hollow tubes made of the globular protein tubulin.

What is the cytoskeleton of a eukaryotic cell composed of?

Microtubules are primarily composed of which protein?