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Proteins
Coenzymes
A thiol
The carboxylic Acid functional Group . It is indicated by R-COOH or R-C(=O)OH or R-C(=O)-O-H 'R' is the rest of the organic molecule The '-' is a single bond The '=' is a double bond Both oxygens are connected directly to the carbon.
carbon. but then all organic molecules also have hydrogen and oxygen too.
Sterol
Functional Group
Nucleic acids
Thiols , organic molecules that contain the -SH group.
While both are organic molecules, glycerol has everything to do with lipids and proteins are in their 'own league'.
A group of atoms responsible for the characteristic behavior of the class of compounds in which the group occurs, as the hydroxyl group in alcohols.
Hydroxyl group