So we see that this trend that is synthesized in a continuous fashion, piece by piece, is known as the leading strand. But this trend is known as the lagging strand because each one of these fragments is synthesized piece or is synthesized one at a time. First we synthesize this fragment, then we synthesize this fragment, then we have to synthesize this fragment, and so forth. And each one of these fragments is known as the Okasagi fragments, after the scientist who basically discovered this process. Now, once all of these Okasaki fragments are actually synthesized, our polymerase removes our RNA primers and replaces with our nucleotides. And an enzyme known as DNA ligase basically connects these Okasagi fragments together and that completes the synthesis or the replication of our lagging strand.