So in one PCR cycle, we have three different steps. Step number one, we call DNA strand separation. Step number two is the hybridization of the DNA primers onto that DNA that we want to replicate. And number three is the actual DNA replication, the DNA synthesis process. So this is one cycle of PCR and we'll see that in just a moment. There are many of these cycles that actually take place to produce the many copies of that single DNA segment that we're interested in.