NEET BIOLOGY

Detailed explanation-1: -Chargaff’s realization that A = T and C = G, combined with some crucially important X-ray crystallography work by English researchers Rosalind Franklin and Maurice Wilkins, contributed to Watson and Crick’s derivation of the three-dimensional, double-helical model for the structure of DNA.

Detailed explanation-2: -British scientist Rosalind Franklin’s application of radiation science was truly historic. Her work with x-ray crystallography confirmed the double-helix structure of the DNA molecule.

Detailed explanation-3: -Created by Rosalind Franklin using a technique called X-ray crystallography, it revealed the helical shape of the DNA molecule. Watson and Crick realized that DNA was made up of two chains of nucleotide pairs that encode the genetic information for all living things.

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: -In addition, to publishing twenty-one papers on carbon structures and nineteen papers on viruses, Franklin is most well known for her discovery of the double helix that makes up DNA and the five publications she authored with her student, R.G. Gosling, on DNA structure (NIH).