List the structural genes involved in the digestion of lactose in E.co

1.	List the structural genes involved in the digestion of lactose in E.coli. Highlight the function of any one.
Answer» There are three structural genes (x, y, a) which transcribe a polycistronic mRNA. 1. Gene z codes β-galactosidase (β-gal), which catalyses the hydrolysis of lactose into galactose and glucose. 2. Gene y codes for permease, which increases the permeability of the cell to β-galactosidase (lactose). 3. Gene a codes for transacetylase, which catalyses the transacetylation of lactose into its active form.

List the structural genes involved in the digestion of lactose in E.coli. Highlight the function of any one.

Answer»

There are three structural genes (x, y, a) which transcribe a polycistronic mRNA.

1. Gene z codes β-galactosidase (β-gal), which catalyses the hydrolysis of lactose into galactose and glucose.

2. Gene y codes for permease, which increases the permeability of the cell to β-galactosidase (lactose).

3. Gene a codes for transacetylase, which catalyses the transacetylation of lactose into its active form.