Relatively small organic molecules with a central carbon atom which is bonded to a carboxyl group, an amino group, a carbon containing group, and a hydrogen atom are called:

The answer is amino acids. This one is organic compounds containing amine and carboxyl functional group and with a side chain. The elements of this amino are carbon, hydrogen, oxygen and nitrogen and the elements found in the side chains of certain amino acids. It consists of carboxylic acid group and amine. This is called 2-alpha.