Which one of the following organism’s plasmid was used successfully for the first time as a vector by Stanley Cohen and Herbert Boyer ? A) Salmonella typhimurium B) Streptococcus pneumoniae C) Staphylococcus aureus D) Rhizobium leguminosarum

Correct option:(A)Salmonella typhimurium

Solution:

• S. Cohen and H. Boyer constructed the first recombinant DNA using antibiotic resistance genes present on the plasmid of drug resistance strains of E. coli.
• Gene was linked to the native plasmid of Salmonella typhimurium.