AP BIOLOGY

Detailed explanation-1: -On 6 May 1952, at King´s College London in London, England, Rosalind Franklin photographed her fifty-first X-ray diffraction pattern of deoxyribosenucleic acid, or DNA.

Detailed explanation-2: -Photograph 51, the famous X-ray diffraction image of DNA taken by X-ray crystallographer Rosalind Franklin and Raymond Gosling in 1952, was a key piece of data that lead to James Watson and Francis Crick’s discovery of DNA’s structure.

Detailed explanation-3: -Rosalind Franklin used X-ray diffraction to determine the structure of DNA molecules.

Detailed explanation-4: -She is best known for an X-ray diffraction image that she and her graduate student Raymond Gosling published in 19531, which was key to the determination of the DNA double helix. But Franklin’s remarkable work on DNA amounts to a fraction of her record and legacy.

Detailed explanation-5: -Photo 51 is an X-ray based fiber diffraction image of a paracrystalline gel composed of DNA fiber taken by Raymond Gosling, a graduate student working under the supervision of Rosalind Franklin in May 1952 at King’s College London, while working in Sir John Randall’s group.