5
QuizMultiple Choice

Cumulative Exam — Cumulative exam

Question 5 • 2025-2026_MDCPS_2000315_Biology_1_A-CR

Which of the following could be a nucleotide of DNA?

Answer
A
deoxyribose + phosphate group + thymine
B
deoxyribose + phosphate group + uracil
C
ribose + phosphate group + thymine
D
ribose + phosphate group + uracil

Explanation

A DNA nucleotide contains deoxyribose sugar, a phosphate group, and one nitrogenous base. Thymine is a DNA base, so deoxyribose + phosphate group + thymine could form a DNA nucleotide. Uracil is found in RNA, and ribose is the sugar in RNA.

AI-written and checked against the verified answer.

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