Becker's World of the Cell 9th Edition by Lewis Kleinsmith, Jeff Hardin, Gregory Paul Bertoni

Exercise 3

Chromosome Movement in Mitosis. It is possible to mark the microtubules of a spindle by photobleaching with a laser microbeam (Figure 19-47). When this is done, chromosomes move toward the bleached area during anaphase.
Are the following statements consistent (C)or inconsistent (I)with this experimental result
(a)Microtubules move chromosomes solely by disassembling at the spindle poles.
(b)Chromosomes move by disassembling microtubules at their kinetochore ends.
(c)Chromosomes are moved along microtubules by a kinetochore motor protein that moves along the surface of the microtubule and "pulls" the chromosome with it.