Based on the model of matter and energy transformations in Figure 3 of the ICA, what role does ethanol fermentation play in C. bescii metabolism? Ethanol fermentation increases the concentration of NADH for continued electron transport and oxidative phosphorylation Ethanol fermentation produces ethanol that can be oxidized in glycolysis to produce ATP Ethanol fermentation increases the concentration of NAD+for continued glycolysis Ethanol fermentation produces CO2 that can be reduced to produce carbohydrates in bacteria.