Answer;
Attached to the central carbon atom in an amino acids are;
-An amino functional group
-A side chain ("R group")
-A carboxyl functional group
- A hydrogen
Step-by-step explanation;
-Proteins are polymers of amino acids monomers. Thus amino acids are the building blocks of proteins, joined by peptide bonds to form polypeptide chains.
-Each molecule of amino acid contains a central carbon (C) atom, called the α-carbon, to which both an amino (-NH2) and a carboxyl group (-COOH) are attached. The remaining two bonds of the α-carbon atom are generally satisfied by a hydrogen (H) atom and the R group.
-Proteins have various functions in the body. Some are enzymes that speed chemical reactions.