Which of the following is not in the correct order of cell cycle progression? a.

Question

Which of the following is not in the correct order of cell cycle progression?

a. interphase, prophase, cytokinesis

b. G2, telophase, G1

c. G1, S, cytokinesis

d. cytokinesis, G1, S

e.mitosis, cytokinesis, G2

Which of the following statements are correct?

a. Cells in G1 enter S phase when cyclin levels decrease.

b. MPF activity decreases the level of mitotic cylin.

c. Cells that enter M phase must progress to G1.

d. MPF activity correlates with levels of mitotic cyclin

e. Mitotic cyclin is degraded by endosomes after being ubiquitinylated by MPF

Explanation / Answer

1. b, c and e are in incorrect order (mitosis and cytokinesis are different events). In the 'b' there is no cytokinesis, in the 'c' there is no mitosis and in the 'e' there is no G1 and S phases before G2, but with your choice G2 is in interphase. So you can say it is wrong with respect to G1 and S and you can say right by considering to total interphase.

But the 'a' showing interphase, mitosis prophase and cytokinesis in order and the 'd' is showing that after cytokinesis cell will enter G1 and S sequentially for next division.

2. a, d and e are the correct answers

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