Question

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which type of macromolecule is made up of subunits that are called amino acids?
carbohydrate
lipid
nucleic acid
protein

Explanation:

To determine the macromolecule made of amino acid subunits, we analyze each option:

• Carbohydrates are made of monosaccharides (like glucose).
• Lipids are a diverse group, often made of fatty acids and glycerol (not amino acids).
• Nucleic acids (DNA, RNA) are made of nucleotides.
• Proteins are polymers formed by linking amino acids through peptide bonds. So proteins are the macromolecules with amino acid subunits.

Answer:

protein