In the process of chromosome separation,how do microtubules maintain contact with the kinetochores and shorten at the same time?
A)Motor proteins move chromosomes down the microtubular structures of the mitotic spindle.
B)Actin microfilaments cause the microtubular proteins to slide past each other.
C)The centrosomes move apart,so the microtubular proteins do not need to shorten.
D)The centrosomes cause the shortening and depolymerization of the microtubular proteins.

Question

Quizplus · Accepted Answer

Motor proteins, such as kinetochore dynein and kinetochore kinesin, move chromosomes down the microtubular structures of the mitotic spindle towards the poles while microtubules shorten at the kinetochores. This maintains contact between the microtubules and kinetochores throughout chromosome separation. Actin microfilaments and centrosome movement do not play a direct role in maintaining contact and shortening of microtubules during chromosome separation.

In the Process of Chromosome Separation,how Do Microtubules Maintain Contact