9
lesson pretestMultiple Choice

Pretest

Question 9 • CMS 2026-2027 Biology CREDIT RECOVERY

Who discovered the monomers of nucleic acids?

Answer
A
Friedrich Miescher
B
James Watson, Francis Crick, and Rosalind Franklin
C
Gerardus Johannes Mulder and Jöns Jacob Berxelius
D
Phoebus Levene

Explanation

Phoebus Levene studied nucleic acids and identified their basic building blocks, called nucleotides. Friedrich Miescher discovered a substance later known as DNA, while Watson, Crick, and Franklin contributed to understanding DNA’s structure; those are different discoveries.

AI-written and checked against the verified answer.

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