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What is cancer? How is a cancer cell dif...

What is cancer? How is a cancer cell different from the normal cell ? How do normal cells attain cancerous nature?

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An abnormal and uncontrolled division of cells is termed as cancer, Genes called cellular oncogenes (c-onc) or proto-oncogens present in normal cells when activated under certain conditions lead oncogenic transformation of the normal cells leading cancer.
A cancer cell is different from the normal cell in following ways
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Knowledge Check

  • One difference between a cancer cell and a normal cell is

    A
    cancer cells cannot function properly because they suffer from contact inhibition
    B
    cancer cells continue to divide even when they are tightly packed
    C
    cell cycle of the cancer cell is arrested at the S phase
    D
    cancer cell is unable to synthesize DNA

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