Regulation of cell cycle

Question 1

Outline three checkpoints

Answer 1

1. Where?
   G1 checkpoint
   What?

Verifies that the cell has grown to the correct size, has synthesised
enough protein for DNA replication, checks if the DNA has been damaged

2. Where?

The G2 checkpoint

What?

ensures that DNA has replicated properly in the S phase, and that the
cell has enough resources for mitosis.

3. Where?

In the metaphase checkpoint

What?

the cell checks the formation of the spindle fibre and if chromosomes are not lined up will not proceed to anaphase