DNA Double Helix Structure: A DNA double helix structure, with two strands of nucleotides twisted together in a spiral fashion. The strands are composed of sugar molecules and phosphate groups, which are linked together by hydrogen bonds between the nitrogenous bases adenine (A), guanine (G), cytosine (C), and thymine (T). The image shows the double helix structure in a dark blue background, with yellow dots representing the nucleotides. The strands are twisted around each other, forming a spiral staircase-like shape. The image also features a few white spots scattered throughout, which may represent errors or mutations in the DNA sequence.