The lac operon is responsible for the production of a regulatory molecule polypeptides that permit e. coli to use a specific sugar as a carbon source for metabolic energy. the lac operon acts as a genetic switch to begin sugar break down, but only if
(1) lactose is present in the cell; and
(2) all glucose has been depleted.

(1) lactose is present in the cell; and

(2) all glucose has been depleted.

Explanation:

Operon  are Clusters of gene that undergo coordinated transcription, and share regulatory regions. Lactose Operon  is the operon responsible for the production of three polypeptides that permit E. coli to utilize the sugar lactose as a carbon source for growth and metabolic energy

Functional Sequences of the Lac Operon  are:

the cells uses some of the atoms of the glucose molecules to atp molecules. the atoms of the glucose molecules will then be converted into energy which will be eventually stored in atp. the energy produced which are stored in atp are coming from the glucose’s chemical bonds.

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