 With the help of these astral microtubules the centrosomes move away from each other towards opposite sides of the cell.Once there, other types of microtubules necessary for mitosis, including interpolar microtubules and K-fibers can begin to form.A final important note about the centrosomes and microtubules during mitosis is that while the centrosome is the MTOC for the microtubules necessary for mitosis, research has shown that once the microtubules themselves are formed and in the correct place the centrosomes themselves are not needed for mitosis to occur.