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Multiple Choice
Which type of macromolecule is made up of subunits called amino acids?
A
Carbohydrates
B
Proteins
C
Nucleic acids
D
Lipids
Verified step by step guidance
1
Understand the question: The problem is asking which type of macromolecule is composed of subunits called amino acids. Amino acids are the building blocks of a specific macromolecule.
Recall the structure and function of macromolecules: Carbohydrates are made of monosaccharides, nucleic acids are composed of nucleotides, lipids are made of fatty acids and glycerol, and proteins are made of amino acids.
Focus on proteins: Proteins are polymers formed by linking amino acids through peptide bonds. This process is called polymerization, and the resulting chain is known as a polypeptide.
Relate amino acids to protein function: Amino acids have a central carbon atom bonded to an amino group (NH₂), a carboxyl group (COOH), a hydrogen atom, and a variable R group. The sequence and composition of amino acids determine the structure and function of proteins.
Conclude: Based on the information, proteins are the macromolecules made up of amino acid subunits. This distinguishes them from carbohydrates, nucleic acids, and lipids.