Alcoholic fermentation, which occurs in yeast, has the following reaction:…
2022
Alcoholic fermentation, which occurs in yeast, has the following reaction:
Pyruvic acid → Acetaldehyde → Ethyl alcohol
A and B enzymes involved in the reaction are respectively -
- A.
Lactate dehydrogenase, Decarboxylase
- B.
Succinyl thiokinase, Alcohol dehydrogenase
- C.
Alcohol dehydrogenase, Pyruvic decarboxylase
- D.
Pyruvic decarboxylase, Alcohol dehydrogenase
Attempted by 18 students.
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Correct answer: D
In alcoholic fermentation (commonly occurring in yeast):
Step 1:
Pyruvic acid → Acetaldehyde + CO₂
Enzyme: Pyruvate (Pyruvic) Decarboxylase
Step 2:
Acetaldehyde → Ethyl Alcohol (Ethanol)
Enzyme: Alcohol Dehydrogenase
Therefore, enzymes A and B are respectively:
Pyruvic Decarboxylase and Alcohol Dehydrogenase.