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Major Functions of Biomolecules

The living matter is composed of mainly six elements: carbon, hydrogen, oxygen, nitrogen, phosphorus and sulphur. These elements together constitute about 90% of the dry weight of the human body. Chemicals or molecules present in the living organisms are known as biomolecules.
Depending upon their weight and solubility biomolecules fall into two categories: micromolecules and macromolecules.
Micromolecules may be inorganic or organic and include water gases, minerals, sugars, amino acids, and nucleotides. Macromolecules generally belong to four classes of organic compounds: carbohydrates, lipids, proteins and nucleic acids.
Major Functions
 Polysaccharide (Glycogen) Storage form of energy to meet short term demands.
 Protein Fundamental basis of structure and function of cell.
 Lipids Storage form of energy to meet long term demands, structural components of membranes.
 DNA (Deoxyribonucleic acid)  Repository of hereditary information.
 RNA ( Ribonucleic acid)  Essentially required for protein biosynthesis.

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