<P> Aerobic metabolism is up to 15 times more efficient than anaerobic metabolism (which yields 2 molecules ATP per 1 molecule glucose). However some anaerobic organisms, such as methanogens are able to continue with anaerobic respiration, yielding more ATP by using other inorganic molecules (not oxygen) as final electron acceptors in the electron transport chain . They share the initial pathway of glycolysis but aerobic metabolism continues with the Krebs cycle and oxidative phosphorylation . The post-glycolytic reactions take place in the mitochondria in eukaryotic cells, and in the cytoplasm in prokaryotic cells . </P> <P> 1 . Glycolysis: </P> <P>--- 2 ATPs + Glucose → 2 Pyruvic Acid + 4 Hydrogen + 4 ATPs </P> <P> 2 . Formation of Acetyl CoA: </P>

Energy molecule produced by cellular respiration and used in metabolic reactions