Questions and Answers

When cells enter mitosis, their existing array of cytoplasmic microtubules has to be rapidly broken down and replaced with the mitotic spindle that forms to pull the chromosomes into the daughter cells. The protein katanin is activated during the onset of mitosis, and chops microtubules into shorter pieces. What do you suppose is the fate of the microtubule fragments created by katanin? Explain your answer.

Which of the statements is false concerning mitosis and meiosis? a) Both of these processes require DNA synthesis beforehand. b) Both of these processes allow genetic variation.

Place the following events in the order in which they occur during the cell cycle by numbering them from 1. In addition, indicate whether each process occurs during G1, S, G2, prophase, prometaphase, metaphase, anaphase, telophase, or cytokinesis.

Exit from mitosis depends upon the degradation of: a. cohesion. b. condensin. c. cyclin B. d. securin. e. separase.

Describe the events a cell goes through during interphase (G1, S, G2).