Regulation of Galactose-Metabolising Enzymes Is Achieved by

Regulation of galactose-metabolising enzymes is achieved by

A) the dissociation of the Gal4p-Gal80p complex by galactose to allow Gal80p to dissociate from the DNA binding site and stimulate transcription.
B) a protein Gal80p binds to Gal4p and stimulates transcription by preventing Gal4p binding to the regulatory domain of the GAL4 gene.
C) a protein Gal80p binds to the regulatory domain of the GAL4 gene and inhibits transcription.
D) an upstream activator sequence binds the activating protein Gal80p and stimulates transcription.
E) an upstream activator sequence binds an activator protein (Gal4p) to accelerate gene transcription.