Which enzyme catalyzes the conversion of pyruvate to lactate?
Correct answer: B. Lactate dehydrogenase
- A. Pyruvate dehydrogenase
- B. Lactate dehydrogenase
- C. Pyruvate kinase
- D. Hexokinase
Explanation
Lactate dehydrogenase reduces pyruvate to lactate using NADH, regenerating NAD+ for glycolysis to continue.
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About Cellular Respiration
Cellular respiration releases energy from glucose through glycolysis, the link reaction, the Krebs cycle and the electron transport chain, producing ATP. The pathway differs in oxygen availability: aerobic respiration uses oxygen and yields more ATP, while anaerobic respiration produces much less ATP and forms lactic acid in muscles or ethanol and carbon dioxide in yeast.
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