From X-ray diffraction data,which of the following was determined about DNA?
A) The amount of adenine equaled the amount of thymine.
B) Different species have different proportions of adenine and guanine.
C) Nitrogen containing bases were arranged on the outside of the double helix structure.
D) The shape of the molecule could be a double helix.
E) All of these were determined.

Question

Quizplus · Accepted Answer

X-ray diffraction data showed a helical structure for DNA, indicating it is a double helix. While A and B are true statements regarding the base pair composition of DNA, they were determined through other methods such as chemical analysis. Option C is false; in fact, nitrogen-containing bases are stacked in the interior of the helix with the sugar-phosphate backbone facing outward.

From X-Ray Diffraction Data,which of the Following Was Determined About