In lactic acid fermentation, pyruvic acid converts into lactic acid by accepting electrons from:
Correct answer: C. NADH
- A. NAD+
- B. NADP+
- C. NADH
- D. NADPH
Explanation
Lactic Acid Fermentation: In this anaerobic process, pyruvic acid is reduced to lactic acid. This is coupled with the oxidation of NADH to NAD+, which is crucial because it regenerates NAD+ needed for glycolysis to continue. The electron acceptor in this process is pyruvic acid, which receives electrons from NADH, not NAD+.
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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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