What is the function of DNA in living organisms?

DNA (deoxyribonucleic acid) serves as the blueprint for all living organisms, storing the genetic information necessary for growth, development, reproduction, and function. It is composed of nucleotides arranged in a double-helix structure, with sequences that encode instructions for producing proteins. These proteins perform essential roles, from building cellular structures to regulating metabolic processes. DNA is inherited from parent organisms, ensuring the transmission of genetic traits. It also enables organisms to adapt over time through mutations and natural selection.