The filament of the flagellum is composed of which protein?

Microtubules are involved in which of the following processes?

Microtubules are involved in:

Statement $X$ : The cytoskeleton is composed of three types of filaments: microfilaments,microtubules,and intermediate filaments.
Statement $Y$ : Microtubules are hollow tubes made of globular protein tubulin.

Which of the following does not contain $tubulin$ protein?

The motile bacteria are able to move by