3
QuizMultiple Choice

Proteins and Nucleic Acids

Question 3 • PA Human Anatomy & Physiology A 2026-2027 SMITH IC

Who first identified nucleic acids, and where were they discovered?

Answer
A
Friedrich Meischer discovered nucleic acids in blood cells.
B
Phoebus Levine discovered nucleic acids in plant cells.
C
James Watson and Francis Crick discovered nucleic acids in DNA.
D
Gerardus Johannes Mulder discovered nucleic acids in bacterial cells.

Explanation

Friedrich Miescher first identified nucleic acids in 1869 while studying the nuclei of white blood cells found in pus. He called the substance “nuclein”; it was later recognized as nucleic acid. Therefore, the choice naming Miescher and blood cells is correct.

AI-written and checked against the verified answer.

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