Information obtained by Franklin from X-ray crystallography on DNA suggested that it is shaped like a

A. hollow cylinder.
B. pleated sheet.
C. icosahedron.
D. helix.
E. ribbon.


Answer: D

Biology & Microbiology

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In terms of public health, the major lethal effect of smoking is ________

A) lung cancer B) oral-facial cancer C) peptic ulcers D) cardiovascular disease

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