DNA and RNA are polymers composed of repeating monomers called:

• A. Amino acids
• B. Nucleotides
• C. Fatty acids
• D. Monosaccharides

Answer: (B)

Verified step by step guidance

1. Understand that DNA and RNA are nucleic acids, which are polymers made up of smaller repeating units called monomers.
2. Recall that the monomers of nucleic acids are called nucleotides, each consisting of a sugar, a phosphate group, and a nitrogenous base.
3. Recognize that amino acids are the monomers of proteins, not nucleic acids.
4. Note that fatty acids are components of lipids, and monosaccharides are the monomers of carbohydrates, so neither applies to DNA or RNA.
5. Conclude that the correct monomers for DNA and RNA are nucleotides.