Humans are unable to digest:
Correct answer: C. Cellulose
- A. Starch
- B. Denatured protein
- C. Cellulose
- D. Fructose
Explanation
Humans are unable to digest cellulose, a type of complex carbohydrate (fiber) found in plant cell walls, due to the lack of the enzyme cellulase in our digestive system. Cellulase breaks down cellulose into simpler sugars, but since we don't produce it, cellulose passes through our digestive system undigested.
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About Macromolecules
Proteins are classified by shape, composition and structure, from primary amino acid sequence to secondary, tertiary and quaternary organisation, and their biological roles are linked to this structure. Enzymes are examined as protein biocatalysts, including active sites, substrate specificity, activation energy, cofactors and factors affecting activity.
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