The functional group of serine molecule should be identified.
In organic chemistry, functional groups are specific groups (moieties) of atoms or bonds within molecules that are responsible for the characteristic chemical reactions of those molecules. Organic compounds are classified depends on the structure and reactivity of the functional group. The functional groups are given below.
Hydroxyl group (alcohol), carboxylic acid (acid), carbonyl group (aldehyde, ketone), ester group, amino group and amide group.
Functional groups are given below.