AP BIOLOGY

Detailed explanation-1: -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-2: -At King’s College London, Rosalind Franklin obtained images of DNA using X-ray crystallography, an idea first broached by Maurice Wilkins.

Detailed explanation-3: -Dr. Franklin used x-ray crystallography to investigate the physical chemistry of carbon and coal. Her findings enabled her to predict how different types of coal would perform as vital fuels for the war effort.

Detailed explanation-4: -Rosalind Franklin used a technique called X-ray crystallography to find out the 3D shape of molecules. She applied this technique to different samples. Early in her career she worked on carbon and coal. Later she started working on biological subjects.

Detailed explanation-5: -Rosalind Franklin discovered the density of DNA and, more importantly, established that the molecule existed in a helical conformation. Her work to make clearer X-ray patterns of DNA molecules laid the foundation for James Watson and Francis Crick’s suggestion that DNA is a double-helix polymer in 1953.