Microtubules increase in length:
A)more quickly at one end than the other.
B)by growing outward from the centrosome.
C)in cycles, following rapid depolymerization.
D)if free tubulin dimers are available.
E)All of these choices are correct.

Question

Quizplus · Accepted Answer

Microtubules exhibit dynamic instability, meaning they can grow or shrink rapidly. They grow more quickly at one end (the plus end) than the other, often grow outward from the centrosome (which organizes the microtubule network in animal cells), and their growth can indeed occur in cycles that may involve phases of rapid growth followed by depolymerization. The availability of free tubulin dimers is essential for the polymerization and growth of microtubules. Therefore, all of the provided choices correctly describe aspects of microtubule length increase.

Microtubules Increase in Length