Topics:
Animal Nutrition, Animal Refresher
Limiting Amino Acids in Cereals
Limiting amino acid in pulses is methionine while in cereals is:
- Lysine — Correct Answer
- Glycine
- Methionine
- Arginine
Explanation:
Correct Answer: Lysine
In cereals (grains), the first limiting amino acid is Lysine. This is a fundamental nutritional concept — while pulses are deficient in methionine, cereals are deficient in lysine, making their combination (pulse + cereal) a complementary protein source.
Limiting Amino Acids by Feed/Species
| Source / Species | First Limiting / Main EAA |
|---|---|
| Cereals (grains) | Lysine |
| Pulses / Legumes | Methionine |
| Pig | Lysine |
| Poultry | Glycine |
| Sheep | Methionine |
| Cat | Taurine |
Lysine in Animal Nutrition
- Lysine is mainly susceptible to Maillard-type reaction (during overheating in hay/feed processing)
- Brown hay (mow-burnt hay) has reduced lysine availability due to Maillard reaction
- The brown colour of hay is due to Maillard-type reaction
Why Other Options Are Wrong
- Glycine → first limiting AA in poultry; not in cereals
- Methionine → first limiting AA in pulses and sheep; not in cereals
- Arginine → not typically the first limiting AA in cereals under standard conditions
📚 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.
