Topics:
Animal Nutrition, Animal Refresher
Components of Ether Extract
Fat soluble vitamins, carotene, and sterols fall under the category of:
- NFE
- EE — Correct Answer
- TDN
- CF
Explanation:
Correct Answer: EE (Ether Extract)
Ether Extract (EE) — also called "Crude Fat" — is the proximate fraction that includes ALL ether-soluble substances: true fats/oils, fat-soluble vitamins (A, D, E, K), carotene, sterols/cholesterol, waxes, and phospholipids. It is determined using a Soxhlet apparatus.
Components of Ether Extract
| Component | Examples |
|---|---|
| True fats (triglycerides) | Tallow, lard, vegetable oils |
| Fat-soluble vitamins | Vitamins A, D, E, K |
| Carotenoids | Beta-carotene, xanthophylls |
| Sterols | Cholesterol, phytosterols |
| Waxes | Cuticle wax of plant surfaces |
| Phospholipids | Lecithin, cephalin |
Instrument Used
- Soxhlet apparatus → feed sample extracted with diethyl ether; residue evaporated to give EE weight.
- EE in TDN formula is multiplied by 2.25 to account for its higher energy density vs carbohydrates.
Why Other Options Are Wrong
- NFE → water-soluble, digestible carbohydrates (sugars, starch); not fat-soluble.
- TDN → Total Digestible Nutrients is a calculated energy measure, not a fractionation category.
- CF (Crude Fibre) → structural carbohydrates (cellulose, hemicellulose, lignin); not ether-soluble.
📚 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.
