Where are the main checkpoints that control the cell cycle?

The main checkpoints that control the cell cycle are:
– G1 Checkpoint: Assesses cell size, nutrient availability, and DNA integrity before entering S phase.
– G2 Checkpoint: Ensures DNA replication is complete and DNA is undamaged before entering mitosis.
– Metaphase Checkpoint: Verifies proper chromosome alignment and attachment to the mitotic spindle before proceeding to anaphase.