We can essentially break this process down into three steps or three stages. So we have step number one, step number two and step number three. And these three steps basically compose one cycle of the polymerase chain reaction. And as we'll see at the end, we can conduct many cycles to produce as many DNA copies as we want to. So let's begin with step number one. Now the entire point in this reaction is to basically use a special type of DNA polymerase molecule to basically replicate our DNA.