Final answer:
Watson and Crick determined the overall molecular structure of DNA based on the work of Franklin and Wilkins.
Step-by-step explanation:
The overall molecular structure of DNA was determined by Watson and Crick. In 1953, they proposed a double helix model for the structure of DNA based on the X-ray crystallography work of Rosalind Franklin and Maurice Wilkins. Franklin's X-ray diffraction images were key in revealing the helical structure of DNA.
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