Multiple Choice
In nucleic acid synthesis, which enzyme catalyzes formation of phosphodiester bonds to join nucleotides into a growing DNA strand?
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1. Introduction to Biochemistry
Nucleic Acids
Multiple Choice
In the context of nucleic acids, ATP and ADP are best classified as which type of biomolecule?
A
Polypeptides (proteins)
B
Triacylglycerols (lipids)
C
Nucleotides (phosphorylated ribonucleotides)
D
Polysaccharides (carbohydrates)
Verified step by step guidance1
Recall the four major classes of biomolecules: proteins (polypeptides), lipids (such as triacylglycerols), carbohydrates (such as polysaccharides), and nucleic acids (which include nucleotides).
Understand that ATP (adenosine triphosphate) and ADP (adenosine diphosphate) are molecules composed of a nitrogenous base (adenine), a sugar (ribose), and phosphate groups.
Recognize that molecules made of a nitrogenous base, a sugar, and phosphate groups are classified as nucleotides, which are the building blocks of nucleic acids like DNA and RNA.
Note that ATP and ADP are phosphorylated ribonucleotides because they contain ribose sugar and phosphate groups attached, making them part of the nucleotide family.
Conclude that ATP and ADP are best classified as nucleotides (phosphorylated ribonucleotides), not proteins, lipids, or carbohydrates.
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