Multiple Choice
In the context of DNA and RNA structure, what is the monomer (basic repeating subunit) of both DNA and RNA?
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7. DNA and Chromosome Structure
DNA Structure
Multiple Choice
In the context of DNA structure, both DNA and RNA are polymers made of repeating building blocks called:
A
Monosaccharides
B
Fatty acids
C
Amino acids
D
Nucleotides
Verified step by step guidance1
Understand that DNA and RNA are nucleic acids, which are polymers made up of smaller units called monomers.
Identify the monomers of nucleic acids: these are nucleotides, which consist of three components—a sugar (deoxyribose in DNA, ribose in RNA), a phosphate group, and a nitrogenous base.
Recognize that monosaccharides are simple sugars, fatty acids are components of lipids, and amino acids are the building blocks of proteins, so these do not form nucleic acids.
Recall that the repeating units in DNA and RNA are nucleotides, which link together through phosphodiester bonds to form the polymer chain.
Conclude that the correct answer is nucleotides, as they are the fundamental building blocks of both DNA and RNA.
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