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practice testMultiple Choice

Practice Test

Question 2 • CMS 2026-2027 Biology CREDIT RECOVERY

Photo 51 is a picture of the structure of DNA that was used to create a model of DNA. Who created the photo?

Answer
A
Erwin Chargaff
B
Rosalind Franklin
C
Friedrich Miescher
D
James Watson and Francis Crick

Explanation

Photo 51 was an X-ray diffraction image of DNA made by Rosalind Franklin and her student Raymond Gosling. The image provided important evidence about DNA’s helical structure, which helped Watson and Crick build their model. Therefore, the correct choice is Rosalind Franklin.

AI-written and checked against the verified answer.

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