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. Which of the following statements believe should be TRUE if your hypothesis is correct? A. The cortisol-responsive genes share a DNA sequence in their regulatory regions that binds the cortisol-responsive transcriptional activator. B. The cortisol-responsive genes must all be in an operon. C. The transcriptional regulators that bind to the regulatory regions of the cortisol-responsive genes must all be the same. D. The cortisol-responsive genes must not be transcribed in response to other hormones.
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