Three major groups of filament systems comprising the cytoskeleton are all composed of polymers of assembled subunits, which vary in thickness when assembled. Which is the CORRECT order, from smallest to largest, of the filament systems

A. microtubules, microfilaments, intermediate filaments
B. intermediate filaments, microtubules, microfilaments,
C. microfilaments, microtubules, intermediate filaments
D. none of the above

Option D

Explanation:

The three types of cytoskeleton vary in their size and their compositions. The smallest of the cytoskeleton is the microfilament made up of monomers actin filaments and measuring about 8nm external diameter.

The next is the intermediate filament measuring about 10nm external diameter. Microtubules are the thickest and are mostly made up of polymers of alpha and beta tubulin.

Option D.

Explanation:

Filament system refers to the structure or long chain of protein present in the cell. The cell shape is formed by three polymer system that make up the cytoskeleton. These three types are microfilament or actin filament, intermediate filaments and microtubules.

The microfilament is the thinnest of the cytoskeleton and it is found in the cytoplasm of eukaryotic cells. It provide support for the cell.

Intermediate filaments provide mechanical support for the cell plasma.

Microtubules are hollow that form the cytoskeleton, they give shape and support to the cell.

It should be microfilament ( thinnest), intermediate filaments ( thick) and microtubules ( thickest).

c. heat from the poles back down towards the equator.