Carbohydrates, like sugar and starch, are staple of the human diet in most parts of the world. These biomolecules are found in cakes, breads and biscuits, and its oxidation is the central energy-yielding pathway in most nonphotosyntetic cells. This is one of the most important characteristics of carbohydrates. Other properties of them includes some insoluble polymers which serves as structural and protective elements in the cell walls of bacteria and plants and in the connective tissues and cell coats of animals. Other carbohydrate polymers lubricate skeletal joints and provide adhesion between cells.

Carbohydrates are polidroxy aldehydes or ketones, or substances that yield such compounds on hydrolysis. Its empirical formula is (CH2O)n and some carbohydrates can also contain nitrogen, phosphorus, or sulphur.

This group of biomolecules is divided into three major size classes which are the monosaccharides, oligosaccharides or polysaccharides. Complex carbohydrate polymers can be found once carbohydrates are covalently attached to proteins or lipids. They are the glycoconjugates.

- Carbohydrates Metabolism;

-- Pentose Phosphate Pathway

-- Citric Acid Cycle

-- Glycolisys

-- Glycogen Breakdown

- Carbohydrates Biosynthesis

-- Glycogen Synthesis