How does DNA structure facilitate DNA replication?

Hm, this is an awkward question because DNA replicates before the cells divide in a stage called "interphase." Surely there is a gene in the DNA responsible for cell division, but--outside of the fact that they're coiled very tightly so that they can even fit into the cell--I believe DNA's structure is irrelevant to mitosis/meiOSis.

Also, the DNA acts as a template, so when replication occurs, the replicated DNA is exactly the same as before, mutation happens when a free nucleotide slips into an empty space in the replication process, so acting as a template can stop the majority of DNA to not mutate.