Which statement correctly distinguishes kinetochore microtubules from polar microtubules?
A) Kinetochore microtubules are replaced by polar microtubules when the chromatids move toward the poles.
B) Only polar microtubules contain cytoplasmic dynein,which acts as a "molecular motor."
C) Kinetochore microtubules attach to the chromosomes,whereas polar microtubules extend from one pole to the other.
D) Kinetochore microtubules form before polar microtubules.
E) There is no difference;they are both names for the same structure.

Question

Quizplus · Accepted Answer

Kinetochore microtubules attach to the kinetochores on the chromosomes, while polar microtubules extend from one pole to the other and do not attach to the chromosomes. This is the main distinguishing factor between the two types of microtubules. The other options are incorrect.

Which Statement Correctly Distinguishes Kinetochore Microtubules from Polar Microtubules