So basically it catalyzes. DNA polymerase catalyzes the formation of phosphol diester bonds. But before DNA polymerase actually begins the process of synthesis another protein enzyme known as primates, which is an RNA polymerase has to actually create something called the RNA primer. So the enzyme primase forms the RNA primer which is basically a specific sequence of nucleotides that signals for DNA polymerase to bind and begin the process of synthesis. So to see what we mean, let's take a look at the following diagram. So basically, once we initiate the process of DNA replication, once our helicase bind to the origin and creates the fork of replication, once our SSB proteins bind to these exposed regions on the single stranded DNA molecule, and once the gyrase molecule binds to our double stranded DNA molecule.