Topics:
Animal Nutrition, Animal Refresher
Composition of Rumen Microbes
Rumen microbes consists of:
- Bacteria
- Fungus, protozoa
- Bacteriophage, oscillospira
- All the above — Correct Answer
Explanation:
Correct Answer: All the above
The rumen ecosystem contains Bacteria, Fungi, Protozoa, Bacteriophage, and also Oscillospira — making "All the above" the most complete answer.
Complete Rumen Microbial Ecosystem
| Microorganism | Population per ml | Classification | Key Function |
|---|---|---|---|
| Bacteria | 10¹⁰⁻¹¹ | Microflora | Fermentation, VFA production |
| Bacteriophage | 10⁹ | Microflora | Lysis of bacteria → releases bacterial protein |
| Protozoa | 10⁶ | Microfauna | Controls bacterial population; starch buffering |
| Fungi | 10³ | Microflora | Breaks lignocellulosic bonds (substrate penetration) |
Additional Notes
- Rumen gas: CO₂ : CH₄ = 65 : 35
- Normal rumen pH: 6.5–6.8; Optimum temperature: 39°C
- VFA profile: Acetate:Propionate:Butyrate = 65:20:10
Why Other Options Are Wrong
- Bacteria alone → incomplete; fungi, protozoa, and bacteriophage are also present
- Fungus, protozoa alone → correct but incomplete; bacteria and bacteriophage also present
- Bacteriophage, Oscillospira alone → incomplete without bacteria, fungi, and protozoa
📚 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.
