Sports And Nutrition — Physical Education STD 12 Commerce — Question

Nutritive components of diet are those components which provide energy or calories.
The word Protein is derived from the Greek word ‘Protias’ Its meaning is 'the best substance from food stuffs'. Protoplasm is formed by protein, which is the base of living cells. The maximum amount of protein is found in the tissues of our body. Besides this, protein is also found in blood, secretion of endocrine glands, bones, teeth and in delicate tissues. If water is extracted from our body, the maximum percentage of protein will be left behind in our body. Protein is a compound, which is formed by the combination of oxygen, carbon, hydrogen and nitrogen. Among energy producing food substance, protein is the only constituent in which chemical elements of nitro-gen, phosphorus and sulphur are found. That is why protein is also called nitrogenous food. Our physical growth and development will be retarded' if we take less amount of protein in our food. Proteins promote cell growth and repair' Apart from this, protein also plays an important role in the mental development of an individual. Proteins are known as the building blocks of life.