Rosalind Franklin was a biophysicist who made critical contributions to the understanding of DNA and RNA. In 1951, Franklin went to King's College where she took the famous Photo 51 and collected important data on DNA which was later used by Watson and Crick. Photo 51 shows that the shape of DNA is a double helix, which also looks like a twisted ladder, formed by two strands of nucleotides twisted around each other. Watson and Crick later used her information on the shape of DNA to make their famous model of DNA.

Rosalind Franklin