Final answer:
A peptide bond is formed when two amino acids join together through a process called dehydration synthesis. This bond is a covalent bond called a peptide bond.
Step-by-step explanation:
A peptide bond is formed when two amino acids join together. This happens through a process called dehydration synthesis, where the amino group of one amino acid reacts with the carboxyl group of another amino acid, resulting in the release of a water molecule. The bond between the two amino acids is a covalent bond called a peptide bond.