Question

define immortal cell lines with examples
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Answer 1

here is ur answer......

immortlized cell lines have undergone similar muitations allowing a cell type which would normally not be able to divide to be proliferated in vitro the origions of some immortal cells .i.e.

HeLa , human cells are naturally occur cancer..

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Answer 2

An immortalised cell line is a population of cells from a multicellular organism which would normally not proliferate indefinitely but, due to mutation, have evaded normal cellular senescence and instead can keep undergoing division. The cells can therefore be grown for prolonged periods in vitro.