You are studying a set of mouse genes whose expression increases when cells are exposed to the hormone cortisol, and you believe that the same cortisol-responsive transcriptional activator regulates all of these genes.If your hypothesis is correct, which of the following statements below should be TRUE?

Question

Quizplus · Accepted Answer

If a common transcriptional activator regulates all of the cortisol-responsive genes, then it is likely that these genes share a common DNA sequence in their regulatory regions that binds this activator, allowing for coordinated regulation of gene expression in response to cortisol. Choice B is incorrect because operons only exist in prokaryotes, and the question is referring to mouse genes, which are eukaryotic. Choice C may or may not be true, as some genes may be regulated by different transcriptional regulators in addition to the cortisol-responsive activator. Choice D is also incorrect because genes may be regulated by multiple factors, including other hormones.

You Are Studying a Set of Mouse Genes Whose Expression