The Cell Cycle

Question 1

what are the 3 stages of the cell cycle

Answer 1

1. Interphase:
G1 - growth
S - where replication occurs
G2 - prep for division
2. Mitosis
3. cytokinesis

Question 2

what is a checkpoint and how do they help

Answer 2

for a cell to move through one phase to the next it must pass through checkpoints
at each checkpoint the specialised proteins determine whether the necessary conditions are met

Question 3

what are the 3 checkpoints

Answer 3

1. end of G1 checks cell growth
2. End of G2 checks replication before mitosis
3. M progress of mitosis

Question 4

what are 3 factors influencing rate and time of cell division

Answer 4

cell size
nutrient dependence
cell density