(a) Carbohydrates that gives a very large number of monosaccharides units on hydrolysis are called polysaccharides e.g. Starch.
(b) Proteins that lose their biological as well as physical activity due to which there is a change in the secondary and tertiary structure are called denatured proteins. e.g. curdling of milk.
(c) Amino acids which cannot be systhesised in our body are called essential amino acids. e.g. Valine