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Question
In yeast, which of the following does not occur during anaerobic respiration?
In yeast, which of the following does not occur during anaerobic respiration?
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Solution
The correct option is B Formation of acetyl CoA
In yeast, the incomplete oxidation of glucose is achieved under anaerobic conditions by reactions where pyruvic acid is converted to carbon dioxide and ethanol. The enzymes pyruvic acid decarboxylase and alcohol dehydrogenase catalyse these reactions. Pyruvate decarboxylase catalysis results in the formation of acetaldehyde, which is reduced to ethanol. Other organisms like some bacteria produce lactic acid from pyruvic acid. Phosphoglyceric acid is formed as a part of glycolysis. Oxidative decarboxylation results in formation of acetyl CoA. It is not formed during anaerobic respiration in yeast.
Formation of acetyl CoA
In yeast, the incomplete oxidation of glucose is achieved under anaerobic conditions by reactions where pyruvic acid is converted to carbon dioxide and ethanol. The enzymes pyruvic acid decarboxylase and alcohol dehydrogenase catalyse these reactions. Pyruvate decarboxylase catalysis results in the formation of acetaldehyde, which is reduced to ethanol. Other organisms like some bacteria produce lactic acid from pyruvic acid. Phosphoglyceric acid is formed as a part of glycolysis. Oxidative decarboxylation results in formation of acetyl CoA. It is not formed during anaerobic respiration in yeast.
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