Question

amino acids are the monomeric units of which macromolecules?
carbohydrates
proteins
nucleotides
lipids

Explanation:

To solve this, we analyze each option:

• Carbohydrates: Monomers are monosaccharides (e.g., glucose), not amino acids.
• Proteins: Amino acids are linked via peptide bonds to form proteins, so amino acids are the monomers of proteins.
• Nucleotides: Monomers of nucleic acids (DNA/RNA), not related to amino acids.
• Lipids: Do not have a single monomeric unit like the others; they are diverse and not built from amino acids.

Answer:

B. Proteins (assuming the options are labeled A - D as A. Carbohydrates, B. Proteins, C. Nucleotides, D. Lipids)