question_answer

Spindle fibres of mitotic cell are made up of

A)  tubulin                

B)  actin

C)  myosin               

D)  collagen

Correct Answer: A

Solution :

                 Spindle fibres are formed during cell division. These are made up of tubulin. Each tubulin molecule is made up of                                                                                                                           and                                                                                                                            sub-units. Tubulin molecules are attached heat to tail and  form a strand and 13 strands aggregate to form a microtubule. These micro tubules are attached to kinetochores of metaphase chromosomes and play an important role in the movement of chromosomes during subsequent stages of cell division.