a-researcher-observes-that-a-microtubule-is-growing-rapidly-at-one-end-which-end

Question

A researcher observes that a microtubule is growing rapidly at one end. Which end is likely growing, and why?

Accepted Answer

The plus end, because it has a GTP cap that stabilizes the addition of new tubulin dimers.

Answer

The plus end, because it is more stable and less dynamic.

Answer

The minus end, because it is closer to the microtubule organizing center.

Answer

The minus end, because it has a higher concentration of GTP-bound tubulin.