Cell Cycle ch 6

Question 1

The Cell Cycle Checkpoints

Answer 1

Checkpoints are the control mechanisms of the cell cycle; they verify and monitor whether the process at each phase of the cell cycle have been accurately completed.

G1 - checks for cell size, nutrients, growth factors, DNA damage
G2 - checks for cell size, DNA replication, DNA damage
Metaphase - checks spindle attachment to chromosomes

Question 2

G0

Answer 2

Resting state: Phase when cell leaves cell cycle.

• differentiation
• DNA damage
• old age of cell