Question

X-ray diffraction photomicrographs of DNA used for preparing DNA model by Watson and Crick were obtained by

A

Bragg

B

Kirkpatrick

C

Astbury and Franklin

D

White.

Hard
Solution
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Correct option is C)

William Astbury, a British scientist, obtained the first X-ray diffraction pattern of DNA. X-ray diffraction patterns of crystallized molecules can reveal their structures with atomic precision.   
Rosalind Franklin's X-ray diffraction patterns of DNA molecules rendered the important clue that DNA has the structure of a double helix. 
Hence the correct answer is (C)

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