And that makes sense because DNA polymerase can only form the new strands in the five to three direction. And each one of these individual fragments, individual pieces, are known as the okasagi fragments. So once again for the leading strand, for this strand here, the DNA polymerase uses the primer to initiate replication. So this purple section is the primer. Our DNA polymerase bind onto our primer and it moves along this fashion, along this direction in a continuous fashion, adding the nucleotide continuously piece by piece in the forward direction in the same direction as the movement of this DNA helicase. But to synthesize the other strand known as the lagging strand, primates creates many RNA primers as far as possible down our parent strand that runs in the five to three direction.