1953 Model of DNA

The 1953 Model of DNA, proposed by Watson and Crick, describes DNA's structure as a double helix, resembling a twisted ladder. The backbone consists of sugar and phosphate molecules, while the rungs are pairs of nitrogen bases (adenine with thymine, and cytosine with guanine). This arrangement explains how genetic information is stored and copied, as the bases pair specifically, allowing DNA to replicate accurately. The model revolutionized understanding of heredity, showing how genetic instructions are encoded and transmitted in living organisms.