GAL80 is a repressor having two binding partners GAL4 and GAL3. What happens to the GAL gene expression process, in the presence of galactose in the medium?

• A. GAL80 binds to GAL4, enhancing the GAL gene expression
• B. GAL80 binds to GAL 4, preventing the GAL gene expression
• C. GAL80 binds with GAL3, enhancing the inhibition of GAL4, and preventing GAL gene expression
• D. GAL80 binds with GAL3, reducing the GAL4 inhibition, activating GAL gene expression

Answer: (D)