After DNA replication is completed, _____.

After DNA replication is completed, _____.

1: each new DNA double helix consists of one old DNA strand and one new DNA strand

2: each new DNA double helix consists of two new strands

3: one DNA double helix consists of the two old strands and one DNA double helix consists of two new strands

4: each of the four DNA strands consists of some old strand parts and some new strand parts

Answer: 1: each new DNA double helix consists of one old DNA strand and one new DNA strand

This process of DNA replication involves the separation of the two spiral chains of DNA in which one of the two strands is capable of serving as the model for creating a new companion. It is called semi-conservative replication and in daughter molecule, one strand is old or parental type while the second strand is new or synthesized. The folded and coiled outlines are new strand and old strand that are interconnected hydrogen bonds embraced the look of a twin helix in DNA. This mechanism ensure that the copy of the DNA is correctly made and is brought over to the daughter cell. The other options are incorrect for the reason that they do not indicate the detail of how many base pairs are synthesized afresh at the new strands of complete DNA double helices during replication.