In Lac Operon the number of Structural genes are

Explanation:

• The lac operon is an example of an inducible operon in prokaryotes, specifically in the bacterium Escherichia coli (E. coli).
• It consists of three structural genes (lacZ, lacY, and lacA) and regulatory elements (promoter, operator, and repressor).
• The lacZ gene codes for the enzyme beta-galactosidase, which hydrolyzes lactose into glucose and galactose.
• The lac operon is typically induced by the presence of lactose, which acts as an inducer by inactivating the repressor protein, allowing transcription of the operon.

The genes and their corresponding proteins are as follows:

• The i gene codes for the repressor of the lac operon.
• The z gene codes for beta-galactosidase (β-gal), which is primarily responsible for the hydrolysis of the disaccharide, lactose into its monomeric units, galactose and glucose.
• The y gene codes for permease, which increases permeability of the cell to β-galactosides.
• The a gene encodes a transacetylase.