Question

______ organism’s plasmid was used for the construction of first recombinant DNA.

• A. Cyanobacteria
• B. Bacillus subtilis
• C. Saccharomyces cerevisiae
• D. Salmonella typhimurium

Answer 1

Answer:

B. Bacillus subtilis

• The first recombinant DNA was constructed by linking a gene encoding antibiotic resistance with a native plasmid of Salmonella typhimurium.

• This experiment was successfully conducted by Stanley Cohen and Herbert Boyer in 1972.