Answer: If a cell has an error in its DNA that cannot be repaired, it may undergo self-destruction (apoptosis ). Apoptosis is a common process throughout life that helps the body get rid of cells that no longer work or that it doesn't need. The cell cycle has checkpoints (also called restriction points), which allow certain genes to check for problems and halt the cycle for repairs if something goes wrong. If a cell has an error in its DNA that cannot be repaired, it may undergo self-destruction (apoptosis ).
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