Topics:
Animal Nutrition, Animal Refresher
Match: Respiratory Quotient (RQ)
MATCH THE COLUMN: Nutrients & conditions with their Respiratory Quotient (RQ)
| Nutrients & conditions | Resp. quotient (RQ) |
|---|---|
| 1. Protein | (a) < 0.7 |
| 2. Fat | (b) 1 |
| 3. Carbohydrate | (c) 0.7 |
| 4. Rapidly fattening hogs | (d) > 1 |
| 5. Fasting/Hibernating animal | (e) 0.8 |
- 1-c, 2-e, 3-b, 4-d, 5-a
- 1-e, 2-c, 3-b, 4-d, 5-a — Correct Answer
- 1-e, 2-c, 3-a, 4-b, 5-d
- 1-b, 2-c, 3-e, 4-d, 5-a
Explanation:
Correct Answer: 1-e, 2-c, 3-b, 4-d, 5-a
The Respiratory Quotient (RQ) = CO₂ produced / O₂ consumed. Different nutrients and metabolic states produce characteristic RQ values.
Respiratory Quotient — Matching
| Nutrient / Condition | RQ Value | Explanation |
|---|---|---|
| 1. Protein | (e) 0.8 | Incomplete oxidation due to nitrogen excretion; RQ between fat and carbohydrate |
| 2. Fat | (c) 0.7 | Lowest RQ; fat contains less oxygen relative to carbon → needs more O₂ |
| 3. Carbohydrate | (b) 1 | Glucose: C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O → RQ = 6CO₂/6O₂ = 1 |
| 4. Rapidly fattening hogs | (d) >1 | Converting carbohydrate to fat → excess CO₂ produced → RQ >1 |
| 5. Fasting/Hibernating animal | (a) <0.7 | Using tissue protein + fat → RQ falls below 0.7 |
RQ Quick Reference
- Fat: 0.7 (lowest); Protein: 0.8; Carbohydrate: 1.0
- RQ >1 → lipogenesis (converting carbs to fat)
- RQ <0.7 → starvation/hibernation (catabolism of body protein + fat)
Why Other Options Are Wrong
- 1-c, 2-e, 3-b, 4-d, 5-a → swaps protein (0.8) and fat (0.7) values
- 1-e, 2-c, 3-a, 4-b, 5-d → assigns RQ=1 to fasting animal; incorrect
📚 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.
