Describe Prokaryotic genome Eukaryotic genome What is an operon and how does it work? What does the epigenome have to do with genetics? What are biofilms and why are they important? Define: Quorum sensing Chemical communication between microbes Electronic communication between microbes Explain how each of the following might control gene expression. Noncoding RNA Riboswitches Mutations What is the significance of vertical gene transfer vs. horizontal gene transfer? vertical Horizontal What is a plasmid and why is it significant?.