Question
Define the following with an example of each:
- Polysaccharides.
- Denatured protein.
- Essential amino acids.
✓
Answer
- Carbohydrates which yield a large number of monosaccharide units on hydrolysis are called polysaccharides. Starch, cellulose, glycogen and gums are most common examples.
- When native protein is subjected to physical change such as change in temperature or a chemical change such as change in pH, its H-bonds are disturbed. This disturbance unfolds the globules and uncoils the helix. As a result, the protein loses its biological activity.
Loss of biological activity by the protein is called denaturation.
- Amino acids which cannot be synthesised inside our body and must be obtained through the diet are called essential amino acids. Examples: Valine, leucine, isoleucine.
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