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

cbse
molecular-basis

#1

a. List the structural genes involved in the digestion of lactose in E.coli.Highlight the function of any one.
b. What triggers the transcription of these genes?


#2

a. There are three structural genes which transcibe a polycistronic mRNA.

  1. Gene z codes b-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 lactose.
  3. Gene a codes for transacetylase, which catalyses the transacetylation of lactose into its active form.
    b. RNA polymerase triggers the transcription of these genes.