Now let's move on to C. Another thing that DNA polymerase actually needs is a primer. So with the primer, we can initiate that DNA replication process. Now, what exactly is a primer? Well, a primer is simply a sequence of nucleotides that are already attached onto that DNA template. And what that primer has is a free three prime hydroxyl group that can basically create that first phosphodia ester bond. And we'll see exactly how that looks like in just a moment.