You observe a cell switch from performing cellular respiration to performing lactic acid fermentation. Why would a cell make this switch? because there isn\'t enough glucose available because there is too much carbon dioxide in the cell because the cell needs lactic acid to obtain the extra ATP from fermentation because there isn\'t enough oxygen for cellular respiration Solution because there isn\'t enough oxygen for cellular respiration Explanation: In the absence of oxygen as the terminal electron acceptor the reduced coenzymes - NADH accumulate. Cell needs NAD+ to keep the glycolysis running. So the cell switches to lactic acid fermentation to regenerate NAD+..