Topics:
Animal Nutrition, Animal Refresher
Vitamin Synthesized from Glucose
Glucose is used for the formation of which vitamin?
- Niacin
- Folic acid
- Ascorbic acid — Correct Answer
- Vita. B2
Explanation:
Correct Answer: Ascorbic acid (Vitamin C)
Ascorbic acid (Vitamin C) is synthesized in the body from Hexose sugar (Glucose) via the glucuronic acid pathway. Most animals (except primates, guinea pigs, and some fish) can synthesize their own Vitamin C from glucose.
Vitamin Synthesis from Precursors
| Vitamin | Precursor / Synthesis Source |
|---|---|
| Vitamin C (Ascorbic acid) | Hexose sugar (Glucose) |
| Vitamin D | Cholesterol (in skin from UV light) |
| Niacin (B₃) | Tryptophan (amino acid) |
| Vitamin A | Beta-carotene (provitamin A) |
Biosynthesis of Vitamin C
- Glucose → Glucuronic acid → Gulonolactone → Ascorbic acid.
- Enzyme: L-gulonolactone oxidase — absent in primates and guinea pigs → dietary Vitamin C required.
- Deficiency of Vitamin C causes Scurvy (bleeding gums, "pithed frog" position in baby pigs).
Why Other Options Are Wrong
- Niacin → synthesized from Tryptophan, not glucose.
- Folic acid → not synthesized from glucose; obtained from diet/gut bacteria.
- Vitamin B₂ (Riboflavin) → synthesized by gut microbes; not from glucose directly.
📚 About this Topic — Animal Nutrition
This multiple choice question is from Animal Nutrition, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Nutrition to strengthen your preparation.
