SME
Grade 9 Science · Problem type
Normal cell or cancer cell?
Use this for “How does a cancer cell differ from a normal body cell?”
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Does it describe a normal cell or a cancer cell?
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Assumptions
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Cancer starts when mutations damage the genes that control the cell cycle.
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A mutated proto-oncogene acts like a stuck accelerator; a broken tumor-suppressor gene, like failed brakes.
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Mutations add up over time, so most cancers need several of them.
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Related lessons
The cell cycle and its control, cancer, mitosis and meiosis
Main lesson
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Mitosis, meiosis or both?
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Which checkpoint stops it?
Use this for “A cell’s DNA is damaged before it is copied. Where in the cycle is it stopped?”