AP+Class+Note+9-10-07

Protection from cancer: PCD Genes: has the info to make protein - Protooncgenes - encourages cells division - Tumor Suppressors (P53) - stop cell division - after DNA damage; no longer inhibits cell division - these two genes are damaged from cancer cells - after DNA damage the cells goes crazy - oncogene: cells go crazy
 * Class Notes : 9-10-07**

Once a cell is a cancer cell the properties: - the ends of the DNA tails never get shorter - the nucleus takes up most of the cell - no function expect to divide - cancer cells can pile up on top of each other - normal cells will stop dividingwhen they touch each other - cancer cells when they pile up on each other create a tumor