Concept:Photo 51 is the famous X-ray diffraction image that provided key evidence for the double helix structure of DNA.
Explanation:The image was taken in 1952 by Rosalind Franklin and Raymond Gosling at King’s College London.
It showed a distinct cross-shaped pattern, which indicated that DNA has a helical structure.
This picture directly helped James Watson and Francis Crick deduce the double helix model of DNA.
Franklin’s work was not fully credited at the time, but later recognized as crucial to the discovery.
Watson, Crick, and Maurice Wilkins later won the 1962 Nobel Prize for the DNA structure.
The image remains a landmark in molecular biology.
Answer:DNA molecules
