Question

what is lacking operon concept?

Answer 1

THE OPERON CONCEPT

• Operon concept states that each metabolic reaction is controlled by a set of genes.

• Each operon consist of a group of genes coding for enzyme involved in a particular metabolism pathway.

• A metabolic pathway is regulated by as a unit.

• Jacob and Monod studied lactose catabolism in E.coli.

• Lactose involves a group of enzyme produced by a group of genes.

• All the genes involved in lactose catabolism are called Lac operon.

• In E.coli, the operon is formed by two types of genes they are structural genes and control genes.

• The structural genes have the codes for the synthesis of enzyme necessary for lactose catabolism.

• The breakdown of lactose into glucose and galactose requires three enzymes.