Topics:
Animal Nutrition, Animal Refresher
Component of Glucose Tolerance Factor
Glucose tolerance factor is:
- Cu
- Co
- Cr — Correct Answer
- None
Explanation:
Correct Answer: Cr (Chromium)
Chromium (Cr), specifically trivalent chromium (Cr³⁺), is known as the "Glucose Tolerance Factor" (GTF). It potentiates the action of insulin, enhancing glucose uptake by cells and improving glucose tolerance.
Chromium (GTF) — Key Facts
- Full name: Glucose Tolerance Factor (GTF)
- Mechanism: Chromium complexes with nicotinic acid and amino acids → forms GTF → potentiates insulin action
- Deficiency → impaired glucose tolerance, insulin resistance
- Dietary sources: Brewer's yeast, liver, whole grains
Mineral Functions — Quick Reference
| Mineral | Special Role/Name |
|---|---|
| Chromium (Cr) | Glucose Tolerance Factor |
| Selenium (Se) | Glutathione peroxidase; synergistic with Vit E |
| Cobalt (Co) | Component of Vitamin B12 (Cyanocobalamin) |
| Iodine (I) | Component of thyroxine hormone |
| Iron (Fe) | Haemoglobin; transported as transferrin |
Why Other Options Are Wrong
- Cu (Copper) → involved in Cytochrome oxidase, Ceruloplasmin, Turacin; not GTF
- Co (Cobalt) → component of Vitamin B12; deficiency causes Enzootic marasmus; not GTF
- None → incorrect; Chromium as GTF is a well-established nutritional fact
📚 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.
