Cancer cells are different from other cells in that they have lost their "contact inhibition." "Contact inhibition" means:
a) DNA replication in most cells stops when the double helix comes in contact with particular enzymes.
b) Genes in the DNA are inhibited from expressing themselves.
c) most cells don't begin to divide until they bump up against other cells or collections of cells.
d) most cells stop dividing when they have reached 50 cell divisions.
e) most cells stop dividing when they bump up against other cells or collections of cells.
Answer: e) most cells stop dividing when they bump up against other cells or collections of cells