You are a professor and a geneticist studying oncogenic mutations in a new form of a muscle sarcoma that your medical colleague discovered. You have evidence that this sarcoma is driven by a translocation of the myc oncogene. Your 1st-year graduate student brings you data from one of these tumors that he says suggests myc expression is being driven by the promoter for synaptin. The synaptin gene is normally only expressed in nerve cells. Why are you skeptical that his explanation is the correct one?
a) Myc oncogene is not associated with muscle sarcoma.
b) Synaptin is not expressed in muscle cells.
c) Synaptin promoter is not active in cancer cells.
d) Synaptin promoter drives gene expression only in nerve cells.