Which aspect of normal lac operon function is an example of

Which aspect of normal lac operon function is an example of post-translational control? A. Interaction of lactose with galactoside permease B. Interaction of lactose with the repressor C. Control of repressor protein synthesis D. Binding of repressor to the operator

Solution

The correct answer is B (interaction of lactose with the repressor)

Post translational modifications are increasing or decreasing the functional diversity of the protein or enzyme by covalent addition of functional groups, cleavage of regulatory subunits or degradation of the total protein. This modification includes glycosylation, methylation ect…..

In lac operon interaction between lactose and repressor undergoes to glycosylation that leads to change the repressor function.