The structures made of hollow protein fibers and used in the movement of chromosomes during cell division are microtubules.

Here's why:

* Hollow protein fibers: Microtubules are indeed hollow cylinders made up of the protein tubulin.

* Chromosome movement: Microtubules form the spindle fibers that attach to chromosomes during mitosis and meiosis. These fibers shorten and lengthen, pulling the chromosomes apart to the opposite poles of the cell, ensuring that each daughter cell receives a complete set of chromosomes.

Let me know if you have any other questions about cell division!