Which process does not function normally in cancer cells?

In cancer cells, the process of apoptosis, or programmed cell death, does not function normally. Instead of undergoing apoptosis when they are damaged or no longer needed, cancer cells often evade this mechanism, allowing them to survive and proliferate uncontrollably. This resistance to cell death contributes to tumor growth and the spread of cancer. Additionally, cancer cells may also exhibit altered cell cycle regulation, leading to unregulated division.