The drug colchicine binds tightly to free tubulin dimers,
preventing their polymerization into microtubules. The drug Taxol
has the opposite effect, binding tightly to microtubules and
preventing them from losing subunits.
A. Which drug would result in elongated microtubules, and which
would result in shorter microtubules?
B. Why is it that both of these drugs result in the same effect,
arresting dividing cells in mitosis?