DNA Structure Explained: Double Helix and Nucleotide Base Pairs #1422349 (License: Personal Use)

This detailed diagram depicts the iconic right-handed double helix of DNA, with sugar-phosphate backbones in orange and blue, and hydrogen-bonded base pairs in yellow (adenine), green (thymine), cyan (cytosine), and pink (guanine). The legend clarifies that adenine (A) pairs with thymine (T) via two hydrogen bonds, while cytosine (C) pairs with guanine (G) via three. The image emphasizes molecular complementarity essential for replication and transcription.

Used in educational biology resources, textbook figures, science websites, and classroom presentations to teach molecular genetics; matches user intent for understanding DNA structure, base pairing rules, and genetic coding fundamentals.