NURSING ANM AND GNM

Detailed explanation-1: -Carbon catabolite repression (CCR) is a regulatory mechanism by which the expression of genes required for the utilization of secondary sources of carbon is prevented by the presence of a preferred substrate.

Detailed explanation-2: -System of gene control in some bacterial operons in which glucose is used preferentially and the metabolism of other sugars is repressed in the presence of glucose.

Detailed explanation-3: -Catabolite repression is positive control of the lac operon. The effect is an increase in the rate of transcription. In this case, the CAP protein is activated by cAMP to bind to the lac operon and facilitate the binding of RNA polymerase to the promoter to transcribe the genes for lactose utilization.

Detailed explanation-4: -Carbon catabolite repression is a global regulatory mechanism that prevents the expression of genes required for the utilization of secondary carbon sources (Postma et al., 1996; Deutscher et al., 2014; Stulke and Hillen, 1999).