Cell cycle checkpoints

Cell cycle checkpoints are regulatory mechanisms in the cell cycle that ensure cells only proceed to the next phase when they are ready and functioning properly. Think of them as quality control measures. There are checkpoints at key stages: before DNA replication, after DNA is copied, and before cell division. If issues like damaged DNA or incomplete processes are detected, the checkpoint can pause the cycle to allow for repair or, if necessary, trigger cell death. This helps maintain healthy cell growth and prevents problems like cancer.