<prompt> Inhibits mitosis by forming microtubules -Vinca alkaloidsDocetaxelEtoposideColchicine  <response>: Ans. is b i.e., Docetaxel Taxanes Paclitaxel and Docetaxel enhances polymerization of tubulin a mechanism opposite to that of vinca alkaloids -- the microtubules are stabilized and their depolymerization is prevented. Vinca alkaloids vincristine, vinblastine prevent polymerization and assembly of microtubules. 