Regulation of the genes responsible for galactose metabolism in Saccharomyces cerevisiae
A) only works because the five genes involved are cistronic.
B) involves the constitutively expressed GAL4 and GAL80 genes.
C) requires GAL4, a positive regulator, mutations in which result in constitutive expression of the GAL genes.
D) All of the answers are correct.
E) None of the answers are correct.

Question

Quizplus · Accepted Answer

The regulation of genes responsible for galactose metabolism in Saccharomyces cerevisiae involves the GAL4 and GAL80 genes, where GAL4 is a transcriptional activator of the GAL genes, and GAL80 inhibits GAL4's activity. GAL4 is expressed constitutively, meaning its expression is constant and not influenced by the presence or absence of galactose.

Regulation of the Genes Responsible for Galactose Metabolism in Saccharomyces