Topics:
Animal Nutrition, Animal Refresher
Liquid Phase Markers in Digestibility
Example(s) of liquid phase marker/indicator for digestibility estimation:
- Polyethylene glycol (PEG)
- Cobalt EDTA
- Chromium EDTA
- All the above — Correct Answer
Explanation:
Correct Answer: All the above
Polyethylene glycol (PEG), Cobalt-EDTA, and Chromium-EDTA are all recognised liquid phase markers used in digestibility estimation to measure the flow rate and dilution of liquid digesta.
Liquid Phase vs. Solid Phase Markers
| Category | Markers | Used to measure |
|---|---|---|
| Liquid phase markers | PEG, Cobalt-EDTA, Chromium-EDTA | Liquid (aqueous) phase passage rate through GI tract |
| Solid phase markers | Chromic oxide, Cerium, Ytterbium, Ruthenium | Solid (particle) phase passage rate |
All Indicators — Complete Classification
- Internal indicators: Lignin, Silica, Acid Insoluble Ash (AIA)
- External indicators: Chromic oxide, Ferric oxide, Mg-ferrite, Cr-EDTA, Cerium
- Liquid phase markers: PEG, Cobalt-EDTA, Chromium-EDTA
Why Other Options Are Wrong
- PEG alone → liquid phase marker but incomplete answer
- Cobalt-EDTA alone → liquid phase marker but incomplete answer
- Chromium-EDTA alone → liquid phase marker but incomplete answer; all three are valid
📚 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.
