CELL RESPIRATION
ANAEROBIC RESPIRATION FERMENTATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Pyruvate is converted to ethanol in two steps with alcohol fermentation
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Pyruvate is reduced directly by NADH to form lactate as an end product, with no release of CO2 with alcohol fermentation
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Detailed explanation-1: -Alcohol fermentation has two steps: glycolysis and NADH regeneration. During glycolysis, one glucose molecule is converted to two pyruvate molecules, producing two net ATP and two NADH.
Detailed explanation-2: -In lactic acid fermentation, pyruvate from glycolysis changes to lactic acid. This type of fermentation is carried out by the bacteria in yogurt, and by your own muscle cells. In alcoholic fermentation, pyruvate changes to alcohol and carbon dioxide. This type of fermentation is carried out by yeasts and some bacteria.
Detailed explanation-3: -Under anaerobic conditions, the pyruvate can be transformed to ethanol, where it first converts into a midway molecule called acetaldehyde, which further releases carbon dioxide, and acetaldehyde is converted into ethanol. In alcoholic fermentation, the electron acceptor called NAD + is reduced to form NADH.
Detailed explanation-4: -In lactic acid fermentation, pyruvate is reduced to lactic acid. This occurs in cells, such as our muscles, when we’re exercising. In alcoholic fermentation, pyruvate is reduced to alcohol and releases carbon dioxide.