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) (B)</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) (A)</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) (A)</p> Signup and view all the answers

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

<p>Glucosamine (A)</p> Signup and view all the answers

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

<p>Sucrose (D)</p> Signup and view all the answers

What happens to ascorbic acid under physiological conditions?

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

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

<p>Glucosamine (B)</p> Signup and view all the answers

Which compound is irreversibly hydrolyzed to diketogulonic acid?

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

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

<p>Glucosamine (D)</p> Signup and view all the answers

What is chondroitin sulfate mainly derived from?

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

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

<p>Heparin (C)</p> Signup and view all the answers

In which type of cells does heparin mostly occur?

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

What are the repeating units that compose chondroitin sulfate?

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

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

<p>Chicken (D)</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 (D)</p> Signup and view all the answers

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