All cells that require and use oxygen go through the Krebs cycle. In the Krebs, carbon dioxide and Adenosine triphosphate, a compound abundant in energy, are produced. The process begins by attaching two-carbon coenzyme with carbon compounds; then changes occur producing energy or more specifically 34 ATP molecules. As a result, the cells gain more energy to continue their process of replication of DNA and synthesis of amino acids. An example is this Australian water dragon lizard.