Multiple Choice
In the context of nucleic acids and cellular energy transfer, which type of biomolecule is ATP?
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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 polypeptide (protein)
B
A triglyceride (lipid)
C
A nucleotide
D
A polysaccharide (carbohydrate)
Verified step by step guidance1
Step 1: Understand the four main classes of biomolecules: proteins (polypeptides), lipids (such as triglycerides), carbohydrates (such as polysaccharides), and nucleic acids (which include nucleotides).
Step 2: Recall that ATP (adenosine triphosphate) consists of a nitrogenous base (adenine), a sugar (ribose), and three phosphate groups, which are the key components of nucleotides.
Step 3: Recognize that nucleotides are the building blocks of nucleic acids like DNA and RNA, and ATP is a nucleotide involved in energy transfer within cells.
Step 4: Compare ATP's structure and function to the other biomolecule classes: it is not a protein (polypeptide), lipid (triglyceride), or carbohydrate (polysaccharide), as it does not have the characteristic structures or functions of these classes.
Step 5: Conclude that ATP is best classified as a nucleotide, a type of biomolecule that serves as a monomer for nucleic acids and plays a critical role in cellular energy metabolism.
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