**Cancer cells** differ from normal cells in that they:
AStop dividing in response to contact inhibition
BHave lost contact inhibition, cell-cycle checkpoints, normal apoptosis; can metastasise; often show angiogenesis
CHave stronger antigens
DLive shorter than normal cells
Answer & Solution
Correct answer: B. Have lost contact inhibition, cell-cycle checkpoints, normal apoptosis; can metastasise; often show angiogenesis
Cancer hallmarks (Hanahan & Weinberg): sustained proliferative signaling, evading growth suppressors, resisting apoptosis, replicative immortality (telomerase), inducing angiogenesis, activating invasion/metastasis, genome instability, deregulated metabolism, immune evasion, tumour-promoting inflammation. Normal regulation breaks down.
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