All organic compounds in nature have one molecule that is common in all of them, namely carbon.
An organic compound is any member of a large group of compounds which may be gaseous, liquid, or solid that have molecules containing carbon.
Organic compounds are the basis of earth's carbon cycle through which biogeochemical processes ensure that carbon moves from living to non living systems and back again.
Examples of organic compounds include proteins, carbohydrates, lipids, nucleic acids, diamond and graphite.