Which pair correctly matches a macromolecule with its monomer?
Correct answer: D. Protein and amino acid
- A. Protein and glucose
- B. Starch and amino acid
- C. Nucleic acid and fatty acid
- D. Protein and amino acid
Explanation
Proteins are polymers of amino acids, starch and cellulose of glucose, and nucleic acids of nucleotides, while fats are not true polymers at all but esters of glycerol and fatty acids. Matching each macromolecule to its monomer and its linkage is the core of this topic. All these polymers are built by condensation and broken by hydrolysis.
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About Classification of Proteins
Proteins are classified by composition as simple, conjugated and derived proteins, and by shape as fibrous or globular proteins. The topic relates these classes to examples such as albumin, keratin, collagen, haemoglobin and casein, while distinguishing structural proteins from proteins with transport, catalytic or regulatory roles.
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