What are the functions of DNA. How are the structure and functions of DNA interconnected?

Storage and transmission of hereditary information – DNA is located strictly in the nucleus.
The DNA molecule is capable of self-reproduction by doubling. Under the action of enzymes, the double helix of DNA unwinds, bonds between nitrogenous bases break.
DNA contains information about the primary structure of all the proteins that the body needs. This information is recorded in a linear nucleotide sequence.
Since proteins play a paramount role in the life of the body, participating in the structure, development, metabolism, it can be argued that DNA stores information about the body.

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