Bacterial genomes frequently contain groups of genes organized into operons. What is the biological advantage of operons to bacteria? Identify the regulatory components you would expect to find in an operon. How are the expressed genes of an operon usually arranged?

Hi, everyone. Welcome back. Which of the following regulates the expression of OPERON by controlling the access of R N A polymerase to the DNA strand choice A promoter. B operator C terminator or D regulatory genes. So in this case, we're talking specifically about something that controls the access of R N A polymerase. Well, are they polymer binds to the promoter? So we're not talking about the promoter, I can eliminate choice a promoter. But we're talking about something that affects the access of R N A plumbers to their promoter. And that would be choice B the operator, the operator is a region within or near the promoter and you can have a repressor bound to the operator that prevents R N A prelimerase being able to access the promoter. So that's why the operator can regulate the expression because it can actually have by having a repressor bound there. R N A polymerase is actually blocked from access to the promoter. So our answer choice here, choice B operator see you in the next video.