Carbohydrates and Glycoconjugates · Zoology

Which carbohydrate is commonly used as an energy source by cells?

  1. Cellulose
  2. Chitin
  3. Glucose
  4. Glycosaminoglycans
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Correct answer: Glucose

Glucose is the primary and preferred energy substrate for most cells. It is catabolized via glycolysis to pyruvate, then fully oxidized through the citric acid cycle and oxidative phosphorylation, yielding up to 30-32 ATP per molecule.

Difficulty: Medium Question 18 of 21

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