PHYSIOLOGY
MUSCLE ENERGETICS GLYCOLYSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Ethanol fermentation, by oxidising NADH and producing CO2 and ethanol.
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Lactic acid Fermentation, by oxidising NADH and producing lacate.
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Ethanol fermentation, by reducing NADH and producing ethanol
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Lactic acid Fermentation, by reducing NADH and producing lactate
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Detailed explanation-1: -Ethanol Fermentation in Yeast. In this process, pyruvate is decarboxylated first to acetaldehyde by the thymine pyrophosphate (TPP)-requiring enzyme pyruvate decarboxylase. The resulting product, acetaldehyde, is then reduced by NADH to form ethanol by the enzyme ethanol dehydrogenase in a process that reforms NAD+.
Detailed explanation-2: -Anaerobic conditions in yeast convert pyruvate to carbon dioxide and ethanol. This occurs with the help of the enzyme pyruvate decarboxylase which removes a carbon dioxide molecule from the pyruvate to yield an acetaldehyde.
Detailed explanation-3: -In alcoholic fermentation, pyruvic acid changes to alcohol and carbon dioxide. This is shown in Figure below. NAD+ also forms from NADH, allowing glycolysis to continue making ATP.