Question

The first r-DNA was constructed in which microorganism?

• A. E. coli}
• B. Salmonella typhimurium}
• C. Vibrio cholera}
• D. Staphylococci}

Hint:

E. coli is a model organism used extensively in recombinant DNA technology due to its simple genetics and fast growth.

Answer 1

The Correct Option is A

The first recombinant DNA (r-DNA) was constructed in the bacterium Escherichia coli (E. coli)} in 1972 by Paul Berg.
It was a significant step in genetic engineering and molecular biology.