Unit 4: Regulation of a Cell Cycle Flashcards
1
Q
what are checkpoints for?
A
to make sure that the cycle is moving along smoothly.
2
Q
what is at the G1 checkpoint?
A
- cell size check
- nutrient check
- growth factor check
- DNA damage check
3
Q
G2 checkpoint?
A
- DNA replication check
- DNA damage check
4
Q
M-spindle fiber checkpoint?
A
fiber attachment to chromosome check
5
Q
what is a cyclin?
A
protein used to activate CDK
6
Q
what are CDKs?
A
- enzymes involved in the cell cycle regulation
- phosphorylate substrates
- promote certain cell cycle activities
7
Q
What happens the cycle does not pass the checkpoint?
A
results in apoptosis or cancer.
