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  4. Plasmid used to construct the first recombinant DNA was isolated from which bacterium species?

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Q. Plasmid used to construct the first recombinant $DNA$ was isolated from which bacterium species?

Biotechnology : Principles and Processes

Solution:

The first recombinant $DNA$ was constructed by Stanley Cohen and Herbert Boyer in $1972$. They cut the piece of $DNA$ from a plasmid carrying antibiotic resistance gene in the bacterium Salmonella typhimurium and linked it to the plasmid of Escherichia coli.