Cell cycle regulation is the process that controls the timing and progression of the cell cycle, which includes phases such as interphase and mitosis. This regulation ensures that cells divide accurately and at the right time, preventing errors that could lead to issues like cancer. Key proteins called cyclins and cyclin-dependent kinases (CDKs) play crucial roles in this regulation by activating or inhibiting various steps in the cycle. Checkpoints within the cell cycle, such as the G1, G2, and M checkpoints, monitor the cell's condition and DNA integrity. If problems are detected, these checkpoints can halt the cycle, allowing for repairs or triggering cell death if necessary. This system is vital for maintaining healthy cell function and preventing uncontrolled cell growth.