What is the basic repeating structural subunit (monomer) of a DNA molecule?
Answer and explanation
Correct answer: A. Nucleotide
- Step 1: DNA is a polymer composed of repeating nucleotides. Step 2. Each nucleotide contains three parts: a phosphate group, a 5-carbon deoxyribose sugar, and one of four nitrogenous bases (A, T, C, G). Answer: Nucleotide. Why not the others: Amino acids build proteins; monosaccharides build carbohydrates.
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