Which explains a difference between prokaryotic and eukaryotic gene reguation? A. Eukaryotic gene regulation is controlled by more than one promoter and one regulator. B. Prokaryotes do not have mRNA, so they do not have processes to degrade mRNA. C. Eukaryotes utilize operons, so they do not need to produce sections of mRNA. D. Prokaryotes process DNA in the nucleus, so genes do not need to be activated.