Which type of nutrient is made up of amino acids?
Proteins are essentially long strings of amino acids, joined end to end. There are twenty-two different amino acids that make up the proteins in the human body, and the exact sequence of amino acids determines what type of protein will be formed. This leads to a great variety of protein molecules of widely different shapes and purposes. Base pair triplets in nucleic acids (DNA and RNA) can represent amino acids to direct protein synthesis, but nucleic acids themselves are not composed of amino acids, nor are carbohydrates or lipids.