Final answer:
Amino acids are the monomers that make up proteins. Each amino acid has the same fundamental structure, which consists of a central carbon atom bonded to an amino group, a carboxyl group, and a hydrogen atom. Every amino acid also has another variable group of atoms bonded to the central carbon atom known as the R group.
Step-by-step explanation:
Amino acids are the monomers that make up proteins. Each amino acid has the same fundamental structure, which consists of a central carbon atom bonded to an amino group (-NHâ‚‚), a carboxyl group (-COOH), and a hydrogen atom. Every amino acid also has another variable atom or group of atoms bonded to the central carbon atom known as the R group. The R group is the only difference in structure between the 20 amino acids; otherwise, the amino acids are identical.