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Farrah Khalid 12 MAS
Cancer is a result of uncontrolled cell division by mitosis; the cell cycle is
controlled by genes
Proto-oncogenes- produce proteins to stimulate cell division & inhibit
cell death
Tumour suppressor genes- prevent cell division or cause cell death.
Normally when cells have divided and produced enough cells they stop dividing, but
mutations (changes in the base sequence) of proto-oncogenes - called oncogenes
- cannot be controlled by tumor suppressors so cells divide out of control resulting
in a tumor.…read more

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