AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

THE SEARCH FOR INHERITABLE MATERIAL

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How did Rosalind Franklin’s photo 51 affect the work of Watson and Crick?
A
It was used to determine the physical structure of DNA
B
It was used to identify the four bases that make up DNA
C
It was used to determine the theory of independent assortment
D
It was used to show DNA was the molecule of inheritance
Explanation: 

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: -In 1962, after Franklin´s death, Watson, Crick, and Wilkins shared the Nobel Prize in Physiology or Medicine for their findings about DNA. Franklin´s Photo 51 helped scientists learn more about the three-dimensional structure of DNA and enabled scientists to understand DNA´s role in heredity.

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: -Thanks to the discovery of DNA, it is now possible for scientists to identify not just the genes, but the individual bases. Before the discovery of DNA, scientists could only uncover the evolutionary tree of life by comparing the bodies and cells of different species.

Detailed explanation-5: -Answer and Explanation: Watson and Crick are famous scientists who created a milestone by determining the structure of DNA. They used X-ray crystallography to identify that DNA is made up of two strands wrapped around each other to produce a double-helical structure.

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