DNA, or deoxyribonucleic acid, serves as the blueprint for life. Its primary function is to store and transmit genetic information essential for the development, functioning, and reproduction of all living organisms. DNA contains genes, which are specific sequences of nucleotides that code for proteins. Proteins, in turn, play crucial roles in the structure and function of cells. DNA's ability to replicate ensures the passing on of genetic instructions to the next generation. Understanding DNA is fundamental to unraveling the complexities of inheritance, genetic traits, and the basis of various diseases.