Final answer:
Amino acids join via dehydration synthesis to form protein polymers and the bond holding amino acids together is called a peptide bond.
Step-by-step explanation:
Amino acids join via dehydration synthesis to form protein polymers. The unique bond holding amino acids together is called a peptide bond. A peptide bond is a covalent bond between two amino acids that forms by dehydration synthesis. Strands containing fewer than about 100 amino acids are generally referred to as polypeptides rather than proteins.