What functional group does hydroxyl represent?

The hydroxyl functional group is represented by the structure -OH, which consists of an oxygen atom bonded to a hydrogen atom, and typically, this group is attached to a carbon atom in organic molecules. This configuration contributes to the polarity of the compound, making it soluble in water and often leading to the classification of compounds containing this group as alcohols.

The presence of the hydroxyl group influences the physical and chemical properties of the molecules, making them quite versatile in biological processes, including metabolism and signaling. Therefore, the correct identification of the hydroxyl functional group as oxygen bonded to carbon and hydrogen aligns with its established chemical structure and behavior.