9
lesson pretestMultiple Choice

Pretest

Question 9 • CMS 2026-2027 Biology CREDIT RECOVERY

Which discovery is attributed to Phoebus Levene?

Answer
A
extraction and observation of DNA
B
identification of ribose and deoxyribose
C
recognition of RNA as DNA’s messenger
D
construction of an accurate DNA model

Explanation

Phoebus Levene identified the sugars in nucleic acids: ribose in RNA and deoxyribose in DNA. Watson and Crick are associated with the accurate DNA model, while the discovery of DNA and recognition of messenger RNA are associated with other scientists. Therefore, the correct choice is identification of ribose and deoxyribose.

AI-written and checked against the verified answer.

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