DNA is a complex molecule that is the building block of life. It is composed of four components: genes, acids, amino acids, and adenine. Genes are sections of DNA that contain instructions for making proteins. Acids are molecules that contain hydrogen and can form bonds with other molecules. Amino acids are molecules that are the building blocks of proteins. Adenine is one of the four nucleobases found in DNA and is essential for the formation of the double HELIX structure of DNA. The double HELIX structure is a spiral shape formed by two strands of DNA that are connected by hydrogen bonds.