객관식
Fermentation allows a cell to:
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24. Metabolism and Nutrition
Fermentation & Anaerobic Respiration
객관식
In human skeletal muscle cells, lactic acid fermentation primarily serves to accomplish which of the following during low-oxygen conditions?
A
Produce oxygen to restore aerobic respiration
B
Generate the majority of ATP by fully oxidizing glucose to and
C
Convert pyruvate into acetyl-CoA to enter the citric acid cycle
D
Regenerate from so glycolysis can continue producing ATP
검증된 단계별 안내1
Understand that during low-oxygen (anaerobic) conditions, skeletal muscle cells cannot rely on aerobic respiration, which normally produces ATP by fully oxidizing glucose to carbon dioxide (CO\_2) and water (H\_2O).
Recall that glycolysis is the initial pathway for glucose breakdown, producing a small amount of ATP and converting NAD\^+ to NADH in the process.
Recognize that for glycolysis to continue, NAD\^+ must be regenerated from NADH; otherwise, glycolysis would halt due to lack of NAD\^+.
Know that lactic acid fermentation converts pyruvate (the end product of glycolysis) into lactic acid, and in doing so, oxidizes NADH back to NAD\^+, thus allowing glycolysis to continue producing ATP even when oxygen is scarce.
Conclude that the primary role of lactic acid fermentation in skeletal muscle cells under low-oxygen conditions is to regenerate NAD\^+ from NADH, enabling continued ATP production via glycolysis.
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