IntroductionAll living organisms require energy. To obtain energy, organism cells must go through the processes of cellular respiration and/or fermentation. How “glucose oxidation leads to ATP production” is emphasized in cellular respiration (Freeman et al., 2014). Three steps can explain cellular respiration: glycolysis, the TCA cycle (or citric acid cycle or Krebs cycle) and oxidative phosphorylation. Glycolysis is divided into two different phases: energy investment and energy return. During glycolysis, “ATP is required and released at different stages” (Jordan & North 2013). The result is a net gain of two ATP, two NADH, and the production of two pyruvate. This process occurs in the cytoplasm. Pyruvates then cross the plasma membrane and reach the mitochondrial matrix. During this processing of pyruvate, NADH and CO2 are released and pyruvates are converted to acetyl CoA. Acetyl CoA then goes through the TCA cycle, producing ATP, NADH, FADH2, and CO2. Finally, NADH and FADH2 go through cha electron transport...