Multiple Choice
In the context of nucleic acids and cellular energetics, ATP is best classified as which type of biomolecule?
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1. Introduction to Biochemistry
Nucleic Acids
Multiple Choice
In the context of nucleic acids, ATP (adenosine triphosphate) is best classified as which type of biomolecule?
A
A nucleotide (a nucleoside triphosphate)
B
A triglyceride (triacylglycerol)
C
A polysaccharide used for energy storage
D
A polypeptide (protein)
Verified step by step guidance1
Recall the four major classes of biomolecules: carbohydrates, lipids, proteins, and nucleic acids.
Understand that ATP (adenosine triphosphate) consists of an adenine base, a ribose sugar, and three phosphate groups.
Recognize that a molecule composed of a nitrogenous base, a sugar, and phosphate groups is classified as a nucleotide.
Note that ATP is specifically a nucleoside triphosphate because it has three phosphate groups attached to the nucleoside (adenosine).
Conclude that ATP is best classified as a nucleotide (a nucleoside triphosphate), not as a triglyceride, polysaccharide, or polypeptide.
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