The antibiotic resistance gene of a plasmid v | vedclass

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(D) In recombinant $DNA$ technology,the antibiotic resistance gene in a plasmid vector serves as a selectable marker.When foreign $DNA$ is inserted in

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Both $B$ and $C$

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(D) In recombinant $DNA$ technology,the antibiotic resistance gene in a plasmid vector serves as a selectable marker.When foreign $DNA$ is inserted into the plasmid,it often disrupts the antibiotic resistance gene (insertional inactivation).$1$. Transformants are cells that have taken up the plasmid (either recombinant or non-recombinant).$2$. Non-recombinants contain the original plasmid with a functional antibiotic resistance gene and can grow on antibiotic-containing media.$3$. Recombinants contain the plasmid with the foreign $DNA$,which disrupts the resistance gene,making them sensitive to the antibiotic.Therefore,the antibiotic resistance gene is used to distinguish between transformants (recombinants vs. non-recombinants) and to specifically identify recombinants.

The antibiotic resistance gene of a plasmid vector is used in the selection of which of the following when foreign $DNA$ is inserted?

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