Here's a breakdown:
* Microtubules are long, hollow cylinders made of the protein tubulin. They are part of the cytoskeleton, which provides structure and support to cells.
* Spindle fibers are microtubules that extend from the poles of the cell during cell division.
* Kinetochore microtubules are a specific type of spindle fiber that attaches to the kinetochore, a protein structure found at the centromere of each chromosome.
* During cell division, the kinetochore microtubules shorten, pulling the chromosomes apart towards opposite poles of the cell.
This process ensures that each daughter cell receives a complete set of chromosomes.
