Answer:
To show the replication of DNA, a semi-conservative method of replication can be shown. The method of DNA replication is similar to that of a zipper. The two strands of the DNA get separated by topoisomerases and helicases. The DNA polymerase adds nucleotides for the new strands to be formed from each of the two parental strands. After the new strands are generated, the previous strands are ligated together with the help of ligases. Hence, a model of the DNA can be constructed like a zipper to show replication.