Now how exactly do we initiate the process of DNA replication? Well, basically a special type of enzyme, a special type of protein known as DNA helicase moves very quickly along the double stranded DNA molecule and it moves until it reaches a point known as the origin of replication. So at the origin of replication the DNA helicase binds to that double stranded DNA molecule via electric forces. Now in eukaryotic cells, eukaryotic cells contain DNA that have multiple origin of replications. And that means we have DNA replication taking place in multiple positions on that double stranded DNA molecule. However, in prokaryotic cells, prokaryotic cells contain DNA that usually only contain a single origin of replication.