DNA structure refers to the overall composition and arrangement of nucleotides that make up the genetic material of living organisms. DNA is a double-stranded molecule that forms a double helix shape, with each strand consisting of a sequence of nucleotides that are connected by hydrogen bonds. The two strands are complementary to each other, with adenine pairing with thymine and guanine pairing with cytosine. Understanding the structure of DNA is crucial for researchers as it provides insights into how genetic information is stored, replicated, and passed on from one generation to the next. Knowledge of DNA structure has also led to advancements in fields such as genetics, molecular biology, and biotechnology. Researchers continue to study DNA structure to uncover more about its functions, interactions with other molecules, and potential applications in various fields.