Watson-Crick Model

The Watson-Crick model, proposed by James Watson and Francis Crick in 1953, describes the structure of DNA as a double helix, resembling a twisted ladder. The sides of the ladder are made of sugar and phosphate molecules, while the rungs consist of paired nitrogenous bases (adenine with thymine, and cytosine with guanine). This complementary pairing allows DNA to store genetic information accurately. The model was groundbreaking in understanding heredity and has since laid the foundation for modern genetics, molecular biology, and biotechnological advancements.