in what locations the mutation which prevent the binding of a certain protein to lts regulatory sequence occur?

(lac l→CAP site→Promotor→Operator→lac Z→lac Y→lac A)

operator locus
(a certain protein=repressor protein(product of the lac l gene))

this mutation results in increased transcription of the genes of the lac operon in lactose-deficient media, although the presence of glucose will prevent maximal transcriptional activity

genetics biology UWorld