The flow of information from DNA to RNA to proteins is a central principle in biology.

If you opened a book on the main themes in biology, you would find that one of them is the relationship between DNA, RNA, and proteins.

In living things, certain segments of DNA, deoxyribonucleic acid; this is the molecule, unique to each individual, carrying the genetic information to be found in every cell; all the information an organism needs to live and reproduce is contained in its DNA, or genes, are essentially directions for building proteins. You can think of those DNA segments as blueprints.

RNA, ribonucleic acid; nucleic acid that uses the instructions stored in DNA to build proteins, uses those DNA segments (genes) to build proteins, as a construction contractor uses blueprints for building structures.

What does RNA build? Proteins. Once completed, like workers in a company, each type of protein, one of the four major classes of large organic molecules, made of amino acids, carries out a specific type of job.

Just as a contractor takes information from a blueprint for a building project, so RNA takes information from DNA to build the proteins necessary for life.