AP BIOLOGY

Detailed explanation-1: -At King’s College London, Rosalind Franklin obtained images of DNA using X-ray crystallography, an idea first broached by Maurice Wilkins. Franklin’s images allowed James Watson and Francis Crick to create their famous two-strand, or double-helix, model.

Detailed explanation-2: -Widely published zoology professor and genetics scholar Matthew Cobb states that the idea that Watson and Crick stole Franklin’s data is false, as the information was not confidential. Cobb does agree that Franklin’s work was crucial; however, he does not challenge the Nobel Prize distribution.

Detailed explanation-3: -The three-dimensional structure of DNA was first proposed by James Watson and Francis Crick in 1953. It is one of the most famous scientific discoveries of all time. X-ray diffraction of DNA crystals results in a cross shape on the X-ray film, which is typical of a molecule with a helix shape.

Detailed explanation-4: -The Nobel Prize in Physiology or Medicine in 1962 was awarded to James Watson, Francis Crick and Maurice Wilkins for their discovery of the molecular structure of DNA, which helped solve one of the most important of all biological riddles.

Detailed explanation-5: -The 3-dimensional double helix structure of DNA, correctly elucidated by James Watson and Francis Crick. Complementary bases are held together as a pair by hydrogen bonds.