Cell Cycle Problems Checkpoints in the cell cycle will prevent division if: If the cell is short of nutrients If the DNA within the nucleus has not been.

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Presentation transcript:

Cell Cycle Problems Checkpoints in the cell cycle will prevent division if: If the cell is short of nutrients If the DNA within the nucleus has not been replicated If the DNA is damaged See pages 159 - 161

If a gene mutation affects the checkpoint proteins, it may result in an out-of-control cell cycle. The result can be uncontrolled cell division = cancer Cancer cells have large, abnormal nuclei Cancer cells are not specialized, so they serve no function Cancer cells attract blood vessels & grow into tumours. Cells from tumours can break away to other areas of the body (= metastasize)

Take the Section 5.1 Quiz