Biochemistry of Respiration - BiologyGuide
Glycolysis occurs in the cytoplasm of cells. Two ATP molecules are used and 4 ATP molecules are produced. Therefore there is a net yield of two ATP molecules. Also, two NAD+ are converted into NADH + H+ during glycolysis
Cellular Respiration Animation - Sumanas, Inc.
Glycolysis itself yields two ATP molecules, so it is the first step of anaerobic respiration. , the product of glycolysis, can be used in to produce ethanol and + or for the production of lactate and NAD+. The production of NAD+ is crucial because glycolysis requires it and would cease when its supply was exhausted, resulting in cell death. A general sketch of the anaerobic steps is shown below. It follows Karp's organization.
where a mole of glucose (about 180 grams) reacts with six moles of O2 with an energy yield ΔG = 2870 kJ. The six moles of oxygen at would occupy 6 x 22.4L = 134 liters. The energy yield from glucose is often stated as the yield per liter of oxygen, which would be 5.1 kcal per liter or 21.4 kJ per liter. This energy yield could be measured by actually burning the glucose and measuring the energy liberated in a calorimeter.