X-ray crystallography of DNA produces an image. Which one of the following is the best description of that image?

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BlackTom AI · Accepted Answer

When analyzing X-ray crystallography of DNA, the output image is best described as a pattern produced by the diffraction of X-rays through a crystal lattice. 
Option 1: 'A diffraction pattern' correctly captures this phenomenon, since the image arises from constructive and destructive interference that forms spots or a pattern indicating the regular arrangement of atoms in the crystal.
Option 2: 'A graph' would imply a plotted relationship between variables (e.g., intensity vs. angle) rather than the characteristic diffraction image produced by the crystal; this is not the direct visual result of X-ray crystallography.
Option 3: 'An absorption spectrum' refers to how the sample absorbs light across wavelengths, not the spatial pattern formed by diffraction; it describes a different type of data, not the crystallographic image.
Option 4: 'An electron micrograph' is obtained from electron microscopy, which uses electrons rather than X-rays and yields a very different imaging modality; the question is specifically about X-ray crystallography, not electron imaging.
Thus, considering the nature of the imaging technique and its output, the best description is a diffraction pattern.

My LMS Subjects Quiz Topic 9: Behind the DNA Helix

X-ray crystallography of DNA produces an image. Which one of the following is the best description of that image?

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