In the given figure,what is the structure labeled '$A$' made of?

Which filaments are responsible for cellular motility?

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.

Microfilaments are composed of which substance?

Match the following columns correctly:

Column $I$ (Filament)	Column $II$ (Structure $\&$ Function)
$(a)$ Microfilaments	$(i)$ Strong and fibrous proteins; provide support to filaments and tubules
$(b)$ Microtubules	$(ii)$ Actin proteins; responsible for cytoplasmic streaming
$(c)$ Intermediate filaments	$(iii)$ Globular tubulin proteins; responsible for chromosome movement

Which of the following is associated with cell division?