Final answer:
A peptide bond forms between the carboxyl and amine groups of amino acids, resulting in the formation of a peptide or protein chain.
Step-by-step explanation:
A peptide bond forms between the carboxyl end of one amino acid and the amine end of another amino acid. When the carboxyl group of one amino acid reacts with the amino group of another amino acid, a peptide bond is formed, and a water molecule is released as a byproduct. This bonding process links the amino acids together to form a peptide or protein chain.