What is the ampicillin resistance gene?

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(A) The ampicillin resistance gene $(amp^R)$ is a gene used in recombinant $DNA$ technology as a selectable marker.It allows for the identification an

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Selectable marker

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(A) The ampicillin resistance gene $(amp^R)$ is a gene used in recombinant $DNA$ technology as a selectable marker.It allows for the identification and selection of transformants (cells that have taken up the recombinant plasmid) from non-transformants.When host cells are grown on a medium containing ampicillin,only those cells containing the plasmid with the resistance gene will survive and form colonies.Therefore,it functions as both a selectable marker and a tool for screening transformants.

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