A <u><em>DIPEPTIDE</em></u> is formed when two amino acids combine and a <u><em>TRIPEPTIDE</em></u> is formed when three amino acids combine. A polypeptide is a long chain of amino acids linked by peptide bonds.
B. A form of energy coupling refers to using the release of energy from exergonic hydrolysis of ATP to initiate other endergonic reactions for cellular metabolism.
