Biomolecules (part-1)

Biomolecules? Biomolecules in class 12 board examinations? Why we Biomolecules? What is the importance of Biomolecules? what is carbohydrate? What is the role of carbohydrate? What is the definition of saccharide? What is the basis for classification of sugars?

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Carbohydrates are defined as optically active polyhydroxy aldehydes or polyhydroxy ketones or compounds which give such compounds on hydrolysis. Carbohydrates provide the major fuel for muscular exercise. Fats and proteins can be used only indirectly—by first being converted into carbohydrates. For this reason, a proper diet should consist primarily of carbohydrates—not primarily of proteins and fats as are commonly consumed in conventional nonvegetarian (and some lacto- and lacto-ovo vegetarian) diets.