The building blocks of nucleic acids are monomers called:

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

Answer: (D)

Verified step by step guidance

1. Understand the question: The problem is asking about the monomers (building blocks) of nucleic acids, which are essential macromolecules in biochemistry.
2. Recall the structure of nucleic acids: Nucleic acids, such as DNA and RNA, are polymers made up of repeating units called monomers. These monomers are nucleotides.
3. Clarify the term 'nucleotide': A nucleotide consists of three components: a nitrogenous base (adenine, guanine, cytosine, thymine, or uracil), a pentose sugar (either ribose or deoxyribose), and a phosphate group.
4. Eliminate incorrect options: Amino acids are the building blocks of proteins, fatty acids are components of lipids, and monosaccharides are the building blocks of carbohydrates. None of these are related to nucleic acids.
5. Conclude that the correct answer is nucleotides, as they are the specific monomers that form the structure of nucleic acids.