Final answer:
Kinetochore proteins control microtubule depolymerization during mitosis, aiding in chromosome alignment and separation.
Step-by-step explanation:
The kinetochore proteins are associated with the precise control of where microtubules depolymerize during mitosis. These proteins are part of the structure that attaches to the centromere of each sister chromatid, providing a point for spindle microtubules to bind during prometaphase, and enable chromosome movements in mitosis. The kinetochore microtubules are responsible for aligning chromosomes at the metaphase plate and pulling sister chromatids apart during anaphase.