DNA Structure Diagram - Nucleotide Components and Base Pairing Explained #177355 (License: Personal Use)

This diagram illustrates the classic Watson-Crick model of DNA, with two antiparallel strands forming a right-handed helix. Each nucleotide consists of a phosphate group (P), deoxyribose sugar (D), and one of four nitrogenous bases-adenine (green), thymine (red), guanine (purple), or cytosine (yellow)-paired via hydrogen bonds (A-T with 2 bonds, G-C with 3). The color-coded legend clarifies molecular components for educational clarity.

Used in biology textbooks, online learning modules, and science websites to teach molecular genetics; matches user intent for understanding DNA composition, replication, or base-pairing rules.