Answer: Cancer cells don't stop making more cells, while normal cells keep a steady pace and know when to stop.
Step-by-step explanation:
Normal cells go through a cycle without complications. Which means that they go through the Interphase and Mitosis/Miosis without duplicating to much. While Cancer cells are cells that do not stop duplicating and can keep growing, there are stop codons called nucleotides that have 3 stop codons. Cancer cells don't get any of them because of either Frame Shift Mutation or Point Mutation.