914-765-0688. 1  Beehive Restaurant, serving Traditional American with a few Mediterranean dishes, is located at 30 Old Route 22, Armonk, NY 10504 in Westchester County. 2  The Cafe at Mariani Gardens is located at 45 Bedford Road in Armonk, NY 10504 in Westchester County.
The Discovery of the lac Operon. In 1961, Francois Jacob and Jacques Monod proposed the operon model of gene regulation in bacteria. The model was based on their study of the genes in E. coli that code for enzymes that affect the breakdown of lactose. Francois Jacob and Jacques Monod. Photo courtesy of Archive Photo. Because of the pioneering work of Jacob and Monod, the lac operon is typically used to illustrate gene regulation in bacteria.
Rating Newest Oldest. Best Answer: The lac operon consists of three adjacent structural genes, a promoter, a terminator, and an operator. The three structural genes are:: lacZ, lacY, and lacA. lacZ encodes Î²-galactosidase (LacZ), an intracellular enzyme that cleaves the disaccharide lactose into glucose and galactose. lacY encodes Î²-galactoside permease (LacY), a membrane bound transport protein that pumps lactose into the cell. lacA encodes Î²-galactoside transacetylase (LacA), an enzyme that transfers an acetyl group from acetyl-CoA to Î²-galactosides.