Multiple choice The structure of DNA (Di - oxy - Ribo Nucleic Acid) was given by _____. Fischer and Watson Watson and Crick Nendal and Fischer Watson and Smolweson Reveal answer Fill a bubble to check yourself B Correct answer Explanation James Watson and Francis Crick discovered the double helix structure of DNA in 1953, building on Rosalind Franklin's X-ray diffraction data and Erwin Chargaff's base-pairing rules.