Who are credited with identifying the structure of DNA?

The identification of the structure of DNA is attributed to Watson and Crick, who proposed the double helix model in 1953. Their model was groundbreaking as it revealed how DNA is structured to allow for the replication and transmission of genetic information. Watson and Crick's work built upon data from other scientists, particularly Rosalind Franklin's X-ray diffraction images, which provided critical insights into the helical structure of DNA.

In contrast, the other individuals mentioned are known for their contributions to different areas of science. Serturner is recognized for his work in pharmacology, specifically the isolation of morphine from opium. Banting and Best are famous for discovering insulin and its effects on diabetes. Koller is not a name typically associated with significant discoveries in the field of genetics or molecular biology. Hence, Watson and Crick are correctly credited with elucidating the structure of DNA, a foundational milestone in genetics and molecular biology.