May become cancerous The Balancing Act of Regulating the Cell Cycle

cell cycle sequence of The cell cycle is a fundamental process of life, regulated by a balance of growth, replication, and positive and negative mechanisms that act at key points during cell growth and differentiation. Proto-oncogenes tend to "push" the cell cycle (in a positively acting manner) by activating various cell cycle pathways within the developing cell. By contrast, tumor suppressor genes normally repress, or "put the brakes on," the activation of the pathways.

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