In this post, we'll explore the critical checkpoints that regulate the cell cycle to ensure accurate and healthy cell division. We'll dive into the G1, G2, and metaphase checkpoints, examining how cells are assessed for proper size, DNA integrity, and chromosome alignment before proceeding through the cycle. Additionally, we’ll discuss the role of Mitosis Promoting Factors (MPF) and why these regulatory mechanisms are vital for preventing errors in cell division that could lead to conditions like cancer.