16Hit1600
Expression of IdeasEasyIntroducing a scientist to a general audience

Expression of Ideas practice question

While researching a topic, a student has taken the following notes: - Rosalind Franklin (1920–1958) was a British chemist. - Her X-ray photographs of DNA fibres revealed its helical structure. - One of her images, Photo 51, was crucial to the 1953 model of DNA. - She also did important work on the structure of viruses.

The student wants to introduce Rosalind Franklin to readers unfamiliar with her. Which choice most effectively uses relevant information from the notes to accomplish this goal?

  1. A. Rosalind Franklin (1920–1958) was a British chemist whose X-ray photographs of DNA — including the crucial Photo 51 — revealed its helical structure.Correct
  2. B. Photo 51 was taken in the early 1950s.
  3. C. DNA has a helical structure.
  4. D. Franklin studied viruses.

Answer: A. Rosalind Franklin (1920–1958) was a British chemist whose X-ray photographs of DNA — including the crucial Photo 51 — revealed its helical structure.

Who she was and what her images showed.

Why the other answers are wrong

B. Photo 51 was taken in the early 1950s.
A date without saying who Franklin was.
C. DNA has a helical structure.
Not about Franklin.
D. Franklin studied viruses.
A secondary detail with no introduction.

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