ORGANIC COMPOUNDS -

• They are substances having both carbon and hydrogen which are commonly biological in origin.
• Organic compounds can be micromolecules or macromolecules.
• Micromolecules are small sized having low molecular weight.
• Macromolecules are large sized having high molecular weight.
• There are four major groups of organic compounds - Carbohydrates, Lipids, Proteins and Nucleic acids
• Except lipids, the other macromolecules are formed by polymerisation or union of repeating subunits called monomers. It produces chains of various lengths.Complex macromolecules are also called polymers.