AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

THE SEARCH FOR INHERITABLE MATERIAL

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following statements is true regarding the discovery of the double helix?
A
Rosalind Franklin’s x-ray crystallography provided Watson and Crick with important data that helped determine the structure of DNA.
B
James Watson, Francis Crick, Maurice Wilkins, and Rosalind Franklin were awarded the Nobel Prize in Medicine for their discovery of the double helix
C
The experiments that led to the discovery of the double helix ultimately disproved Chargaff’s rules regarding nitrogenous bases.
D
It was discovered that double-stranded DNA is a parallel molecule.
Explanation: 

Detailed explanation-1: -The discovery of the structure of DNA in 1953 was made possible by Dr Rosalind Franklin’s X-ray diffraction work at King’s. Her creation of the famous Photo 51 demonstrated the double-helix structure of deoxyribonucleic acid: the molecule containing the genetic instructions for the development of all living organisms.

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. Franklin’s images allowed James Watson and Francis Crick to create their famous two-strand, or double-helix, model.

Detailed explanation-3: -Double helix, as related to genomics, is a term used to describe the physical structure of DNA. A DNA molecule is made up of two linked strands that wind around each other to resemble a twisted ladder in a helix-like shape. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups.

Detailed explanation-4: -In 1962, James Watson, Francis Crick and Maurice Wilkins received the Nobel prize for the discovery of the structure of DNA. Notably absent from the podium was Rosalind Franklin, whose X-ray photographs of DNA contributed directly to the discovery of the double helix.

There is 1 question to complete.