What unwinds the two DNA strands during replication?

Transcription and replication. According to evolution that is. Is this question asking at the begininning of time, or an overall in-body DNA question?

Life as we know it cannot replicate itself without being in a living organism. RNA polymerase reads and unzips the double helix of DNA to create RNA in which leads on to creating protiens... yahda yahda yahda.

According to the scientific evidence on the original formation of DNA... somehow the necessary compounds for creating it orginated out of a slew in the hot early times of earth over 3000 million years ago. This also could have been helped by on or two meteroids hitting earth with some valuable new atoms or compounds. And out of these compounds, there arrived DNA. Developed and replicated there in the mud with no ATP energy... and started to move on to develope bacteria, which much later evolved into us.

Do I believe this? No I certainly do not. I know that God created the earth and that our bodies and everything organism out there... is made up out of; Nitrogen, Oxygen, Carbon, and Hydrogen. What are the 4 main components of dirt? Nitrogen, Oxygen, Carbon, and Hydrogen. Isn't it lovely what science has figured out for us?