AP Biologyeasymcq1 pt

Which trio of components makes up one DNA nucleotide?

A.Deoxyribose, a phosphate group, and a nitrogenous base

B.Ribose, a sulfate group, and a nitrogenous base

C.Glycerol, three fatty acids, and a phosphate group

D.An amino group, a carboxyl group, and a variable side chain

Explanation

Core Concept

Every DNA building block assembles these three parts: a five-carbon deoxyribose sugar, at least one phosphate attached to the sugar, and one of four nitrogen-containing bases. Sugar and phosphate furnish the covalent backbone while the base projects inward for pairing with the opposite strand. Ribose belongs to RNA, glycerol with fatty acids builds fats, and an amino group plus carboxyl group plus variable side chain describes an amino acid instead.

Correct Answer

ADeoxyribose, a phosphate group, and a nitrogenous base

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