Following the attachment of spindle microtubules to kinetochores, chromosomes are moved around by
A) motor activity taking place in the centrosomes.
B) elongation and shortening of microtubules.
C) histones.
D) myosin motor proteins.

Question

Quizplus · Accepted Answer

Chromosomes are moved around by the elongation and shortening of microtubules attached to the kinetochores. This movement is facilitated by the action of motor proteins located on the microtubules themselves. Other motor proteins, such as myosin, are not involved in this process. Histones play a structural role in DNA packaging but do not contribute to chromosome movement during mitosis. Similarly, motor activity in the centrosomes is not directly involved in the movement of chromosomes.

Following the Attachment of Spindle Microtubules to Kinetochores, Chromosomes Are