Answer:
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
Cancer cell
Normal cell
Cancer cells divide in an uncontrolled
manner.
The cells do not show contact
inhibition.
Life span is indefinite
Normal cells divide in a controlled
manner.
The cells show contact inhibition
Life span is definite
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