DNA Structure Explained: Double Helix, Backbone, and Base Pairing #1422363 (License: Personal Use)

The image presents two complementary views of DNA: a simplified schematic on the left illustrating the antiparallel strands, 0.34 nm base-pair rise, 3.4 nm per turn, and 2 nm diameter, with labeled sugar-phosphate backbones and complementary base pairs (A-T, G-C). On the right, a space-filling molecular model reveals the atomic composition-phosphorus in the backbone, carbon, hydrogen, oxygen, and nitrogenous bases-highlighting the chemical reality behind the iconic double helix.

Used in educational biology content (e.g., textbooks, MOOCs, university lectures) to teach molecular genetics fundamentals; matches user intent for visual learning of DNA’s structural hierarchy from macro to atomic scale.