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Which enzyme catalyzes the conversion of pyruvic acid to ethanol in yeast fermentation?
- a)Decarboxylase and dehydrogenase
- b)none
- c)Lactate dehydrogenase
- d)Glyceraldehyde-3-phosphate dehydrogenase
Correct answer is option 'A'. Can you explain this answer?
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Which enzyme catalyzes the conversion of pyruvic acid to ethanol in ye...
The enzyme that catalyzes the conversion of pyruvic acid to ethanol in yeast fermentation is pyruvic acid decarboxylase. This enzyme facilitates the decarboxylation of pyruvic acid, removing a carbon dioxide (CO2) molecule and resulting in the formation of acetaldehyde. Acetaldehyde is further reduced to ethanol by the action of another enzyme called alcohol dehydrogenase.
Option a) "Pyruvic acid decarboxylase" is the correct answer because it accurately identifies the specific enzyme involved in the conversion of pyruvic acid to ethanol in yeast fermentation.
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Which enzyme catalyzes the conversion of pyruvic acid to ethanol in ye...
Answer:
Enzyme involved in the conversion of pyruvic acid to ethanol in yeast fermentation:
The enzyme that catalyzes the conversion of pyruvic acid to ethanol in yeast fermentation is pyruvic acid decarboxylase.
Explanation:
1. Yeast fermentation:
Yeast fermentation is an anaerobic process that occurs in yeast cells. It involves the conversion of glucose to ethanol and carbon dioxide. This process is commonly used in the production of alcoholic beverages and baking.
2. Glycolysis:
The first step in yeast fermentation is glycolysis, where glucose is converted to pyruvic acid. This process occurs in the cytoplasm of yeast cells and produces a net gain of 2 ATP molecules.
3. Conversion of pyruvic acid to ethanol:
After glycolysis, pyruvic acid is further converted to ethanol in yeast fermentation. This conversion involves two enzymatic steps:
- Pyruvic acid decarboxylase: This enzyme catalyzes the decarboxylation of pyruvic acid, removing a carbon dioxide molecule and producing acetaldehyde. This step is an important regulatory step in yeast fermentation.
- Alcohol dehydrogenase: After the decarboxylation step, acetaldehyde is further converted to ethanol by the enzyme alcohol dehydrogenase. This enzyme uses NADH (derived from glycolysis) as a cofactor in the reduction of acetaldehyde to ethanol.
4. Role of pyruvic acid decarboxylase:
Pyruvic acid decarboxylase is the enzyme that initiates the conversion of pyruvic acid to ethanol in yeast fermentation. It catalyzes the decarboxylation of pyruvic acid, releasing carbon dioxide and producing acetaldehyde. This enzyme plays a crucial role in redirecting the metabolic pathway towards ethanol production in yeast cells.
In conclusion, the enzyme pyruvic acid decarboxylase is responsible for the conversion of pyruvic acid to ethanol in yeast fermentation. It catalyzes the decarboxylation of pyruvic acid, leading to the production of acetaldehyde, which is further converted to ethanol by the enzyme alcohol dehydrogenase.
Enzyme involved in the conversion of pyruvic acid to ethanol in yeast fermentation:
The enzyme that catalyzes the conversion of pyruvic acid to ethanol in yeast fermentation is pyruvic acid decarboxylase.
Explanation:
1. Yeast fermentation:
Yeast fermentation is an anaerobic process that occurs in yeast cells. It involves the conversion of glucose to ethanol and carbon dioxide. This process is commonly used in the production of alcoholic beverages and baking.
2. Glycolysis:
The first step in yeast fermentation is glycolysis, where glucose is converted to pyruvic acid. This process occurs in the cytoplasm of yeast cells and produces a net gain of 2 ATP molecules.
3. Conversion of pyruvic acid to ethanol:
After glycolysis, pyruvic acid is further converted to ethanol in yeast fermentation. This conversion involves two enzymatic steps:
- Pyruvic acid decarboxylase: This enzyme catalyzes the decarboxylation of pyruvic acid, removing a carbon dioxide molecule and producing acetaldehyde. This step is an important regulatory step in yeast fermentation.
- Alcohol dehydrogenase: After the decarboxylation step, acetaldehyde is further converted to ethanol by the enzyme alcohol dehydrogenase. This enzyme uses NADH (derived from glycolysis) as a cofactor in the reduction of acetaldehyde to ethanol.
4. Role of pyruvic acid decarboxylase:
Pyruvic acid decarboxylase is the enzyme that initiates the conversion of pyruvic acid to ethanol in yeast fermentation. It catalyzes the decarboxylation of pyruvic acid, releasing carbon dioxide and producing acetaldehyde. This enzyme plays a crucial role in redirecting the metabolic pathway towards ethanol production in yeast cells.
In conclusion, the enzyme pyruvic acid decarboxylase is responsible for the conversion of pyruvic acid to ethanol in yeast fermentation. It catalyzes the decarboxylation of pyruvic acid, leading to the production of acetaldehyde, which is further converted to ethanol by the enzyme alcohol dehydrogenase.
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Which enzyme catalyzes the conversion of pyruvic acid to ethanol in yeast fermentation?a)Decarboxylase and dehydrogenaseb)nonec)Lactate dehydrogenased)Glyceraldehyde-3-phosphate dehydrogenaseCorrect answer is option 'A'. Can you explain this answer?
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