Q.) What is cancer? What causes a normal cell to turn cancerous? How is it different from a normal cell? (RAS) 5m/50w {Biology}

Cancer is an uncontrolled and abnormal division of cells. Under certain conditions, genes such as proto-oncogenes or cellular oncogenes present in normal cells get activated leading to their oncogenic transformation causing cancer. Following are the differences between normal and cancerous cells.

Normal cells	Cancerous cells
They divide in a controlled manner	Divide uncontrollably
Cells exhibit contact inhibition	Cells do not display contact inhibition
Perform specific function normally	Often loses its normal function
Definite lifespan	Indefinite lifespan
Has normal genetic material	Contains multiple genetic mutations