Question: the operon model of the regulation of gene

title: Operon
text: Polycistronic operon Regulatory sequence Regulatory sequence Enhancer Enhancer / silencer / silencer Operator Promoter 5'UTR ORF ORF UTR 3'UTR Start Start Stop Stop Terminator Transcription DNA RBS RBS Protein coding region Protein coding region mRNA Translation Protein The structure of a prokaryotic operon of protein - coding genes . Regulatory sequence controls when expression occurs for the multiple protein coding regions ( red ) . Promoter , operator and enhancer regions ( yellow ) regulate the transcription of the gene into an mRNA . The mRNA untranslated regions ( blue ) regulate translation into the final protein products .