Which of the following is NOT a macromolecule?
Correct answer: C. Glucose
- A. Starch
- B. Glycogen
- C. Glucose
- D. Cellulose
Explanation
Glucose is a monosaccharide, a single small unit and therefore a micromolecule, while the other three are polysaccharides built from thousands of glucose units joined by glycosidic bonds. Macromolecules are polymers assembled from repeating monomers by condensation, so the test is whether the molecule can be hydrolysed into smaller repeating units. Glucose cannot.
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About Classification of Biological Molecules
Biological molecules are classified as carbohydrates, lipids, proteins and nucleic acids, with water, minerals and vitamins also supporting cellular processes. The key distinctions involve their monomers, chemical bonds, structures and functions, including glucose and starch, fatty acids and triglycerides, amino acids and polypeptides, and nucleotides in DNA and RNA.
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