DNA, or deoxyribonucleic acid, is a molecule that contains the biological instructions that make each species unique. It is present in all forms of life on earth and contains each organism's genetic code ,DNA is responsible for carrying and transmitting the hereditary materials or the genetic instructions from parents to offspring ,The primary function of DNA is to carry the instructions for the development, growth, reproduction, and functioning of all life ,DNA sequences must be converted into messages that can be used to produce proteins, which are the complex molecules that do most of the work in our bodies ,Each gene stores the directions for making protein fragments, whole proteins, or multiple specific proteins ,DNA is well-suited to perform this biological function because of its molecular structure, and because of the development of a series of high-performance enzymes that are fine-tuned to interact with this molecular structure in specific ways ,In summary, the function of DNA is to carry the genetic information that determines the traits and characteristics of an organism, and to direct the production of proteins that are essential to the growth, development, and functioning of cells