alleryStart learning →Which enzyme catalyses the conversion of pyruvic acid to lactic acid?
ASuccinate dehydrogenase
BAlcohol dehydrogenase
CPyruvate decarboxylase
DLactate dehydrogenase
Answer & Solution
Correct answer: D. Lactate dehydrogenase
1. Lactic acid fermentation converts pyruvic acid and NADH into lactic acid and the oxidized carrier.
2. The enzyme used in that reaction is lactate dehydrogenase.
3. Alcohol dehydrogenase belongs to the second reaction of alcohol fermentation instead.
4. Succinate dehydrogenase is a citric acid cycle enzyme embedded in the inner mitochondrial membrane.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 7 "Cellular Respiration", section 7.5 Metabolism without Oxygen_
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