Vitamin C (Ascorbic Acid) Properties and Sources
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Questions and Answers

Which compound is a γ-lactone that is synthesized by plants and almost all animals except primates and guinea pigs?

  • D-Sorbitol
  • Vitamin C (Ascorbic Acid) (correct)
  • Sucrose
  • Invert Sugar
  • Which compound is rapidly degraded during cooking in the presence of air?

  • Invert Sugar
  • D-Mannitol
  • Vitamin C (Ascorbic Acid) (correct)
  • Sucrose
  • Which compound is essential for the formation of collagen?

  • Vitamin C (Ascorbic Acid) (correct)
  • Sucrose
  • Invert Sugar
  • D-Sorbitol
  • Which compound is not proven to alleviate the common cold and other viral infections when consumed in large doses?

    <p>Vitamin C (Ascorbic Acid)</p> Signup and view all the answers

    Which compound, when deficient in the human diet, results in the disease known as scurvy?

    <p>Vitamin C (Ascorbic Acid)</p> Signup and view all the answers

    Which compound is synthesized in animals from glucose and in plants from L-galactose?

    <p>Vitamin C (Ascorbic Acid)</p> Signup and view all the answers

    Which compound is synthesized from fructose 6-phosphate and glutamine?

    <p>Glucosamine</p> Signup and view all the answers

    Which compound is used in the biosynthesis of proteoglycans and glycosaminoglycans?

    <p>Sucrose</p> Signup and view all the answers

    What happens to ascorbic acid under physiological conditions?

    <p>It is reversibly oxidized to dehydroascorbic acid</p> Signup and view all the answers

    Which compound is the most commonly used supplement by patients with osteoarthritis?

    <p>Glucosamine</p> Signup and view all the answers

    Which compound is irreversibly hydrolyzed to diketogulonic acid?

    <p>Ascorbic Acid</p> Signup and view all the answers

    Which compound is a biochemical precursor of all nitrogen-containing sugars?

    <p>Glucosamine</p> Signup and view all the answers

    What is chondroitin sulfate mainly derived from?

    <p>Cow cartilage</p> Signup and view all the answers

    Which of the following glycosaminoglycans is the most negatively charged polyelectrolyte in mammalian tissues?

    <p>Heparin</p> Signup and view all the answers

    In which type of cells does heparin mostly occur?

    <p>Mast cells</p> Signup and view all the answers

    What are the repeating units that compose chondroitin sulfate?

    <p>Glucuronic acid and galactosamine</p> Signup and view all the answers

    Which animal source is NOT typically used to derive chondroitin sulfate?

    <p>Chicken</p> Signup and view all the answers

    Which glycosaminoglycan is often combined with glucosamine as a dietary supplement to minimize arthritis and cartilage problems?

    <p>Chondroitin sulfate</p> Signup and view all the answers

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