Question

Operon model of gene regulation and organisation of prokaryotes was proposed by

• A. Meselson and Franklin
• B. Wilkins and Franklin
• C. Beadle and Tatum
• D. Jacob and Monod

Answer 1

The correct option is D Jacob and Monod

Jacob and Monod
Francois Jacob (a geneticist) and Jacques Monod (a biochemist) proposed the operon model in $1961$.
An operon is a coordinated group of genes that function together to regulate gene expression in prokaryotes.
Final answer
(D) Jacob and Monod