What is DNA, again? This educational diagram illustrates DNA as a polymer made of repeating nucleotides, each consisting of a simple sugar, a phosphate group, and a nitrogenous base, with a clear depiction of the double helix structure and base pairing.
Diagram showing the structure of DNA, including a double helix with labeled components such as nucleotides, nitrogenous bases (adenine, thymine, cytosine, guanine), sugar-phosphate backbone, and base pairing (A-T, C-G).