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QPM amino acid significance comparison
Protein is an important part of a chicken's diet. Proteins contain 20 different types of amino acid. A chicken can make many of the 20 amino acids from other substances in the diet. Essential amino acids are amino acids the chicken cannot make, so they must be included in the diet. Maize seeds contain protein but the proportion of some essential amino acids is low. Scientists have produced a type of maize called Quality Protein Maize (QPM). Table 2 compares the proportions of seven essential amino acids in normal maize seeds and in QPM seeds.
| Amino acid | Normal maize | Quality protein maize (QPM) |
|---|---|---|
| Leucine | 122.2 | 88.1 |
| Lysine | 28.9 | 41.9 |
| Methionine | 19.9 | 18.1 |
| Phenylalanine | 49.4 | 40.9 |
| Threonine | 34.5 | 36.5 |
| Tryptophan | 7.3 | 16.3 |
| Valine | 45.9 | 51.2 |
Which amino acids are found in significantly higher proportions in the QPM seeds? Tick (✓) one box.
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Marking points
- 1 Selects Lysine and tryptophan.