# Prokaryotic DNA --- [[prokaryote|Prokaryotes]] have a few unique features of their [[DNA]] that is adapted for efficiency and simplicity. ## Circular DNA Unlike eukaryotic DNA—which is linear—prokaryotic DNA is circular, and can be [[DNA replication|replicated]] all in one go starting with a single [[replication bubble|origin of replication]]. ![[circular DNA.png]] ## Operons An **operon** is a set of [[gene|genes]] that all code for related proteins, that are all coded onto a single polysistronic [[mRNA]]. The **[[Lac operon]]** is one of the most well known operons, and describes several genes responsible for the metabolism of lactose. ___