How are cancer cells different from normal cells?
It has different characteristics. (2)
A normal cell has it's oncogene switched off and it's tumour suppressant gene switched on. When the cell comes in contact with a carcinogen, the cell is mutated. And if this mutation involves the switching on of the oncogene and the switching off of the tumour suppressant gene, the cell will multiply at an extremely high rate, eventually forming a tumour.