Know Enzymes. Enzymes are miracles of nature. Enzymes are large protein molecules, and like other proteins, they are made up of long chains of amino acids. Enzymes are present in all living things, where they perform the essential functions of converting food to energy and new cell material.now Enzymes. Enzymes are miracles of nature. Enzymes are large protein molecules, and like other proteins, they are made up of long chains of amino acids. Enzymes are present in all living things, where they perform the essential functions of converting food to energy and new cell material.