Dna -

The National Human Genome Research Institute defines DNA as a , a shape resembling a twisted ladder.

DNA () is the hereditary molecule that carries the genetic "instruction manual" for the development, survival, and reproduction of nearly all living organisms . It functions as a stable repository of information, stored in every cell's nucleus, that dictates physical traits and biological functions. Molecular Structure The National Human Genome Research Institute defines DNA

The "rungs" are formed by pairs of bases held together by hydrogen bonds. They follow strict pairing rules: Adenine (A) always pairs with Thymine (T) . Guanine (G) always pairs with Cytosine (C) . The Genetic Code stored in every cell's nucleus

These are the basic building blocks, each consisting of a sugar, a phosphate, and one of four nitrogenous bases. each consisting of a sugar