The X-Ray Diffraction Pattern of DNA Discovered by Rosalind Franklin

question 25

Multiple Choice

The X-ray diffraction pattern of DNA discovered by Rosalind Franklin showed that DNA

• A) is helical.
• B) has a repeated pattern.
• C) is both helical and has a repeated pattern.
• D) contains beta sheets arranged in a repeated pattern.
• E) contains alpha helices and beta sheets. Rosalind Franklin's DNA diffraction data demonstrated that it is helical, from the X pattern in the center, and that it is repeated over and over, from the dark portions at the top and bottom edges. James Watson and Francis Crick incorporated Franklin and Chargaff's work into their description of the structure of DNA.

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