Discussion
Which of the following processes leads to production of lactic acid ?
Answer: B
Lactic acid is produced by anaerobic respiration in humans.
During heavy exercise the muscles run short of oxygen and break glucose down without it. In human muscle cells this gives lactic acid and a little energy; the build-up of lactic acid is linked with muscle cramps.
Aerobic respiration breaks glucose down completely to carbon dioxide and water. Anaerobic respiration in yeast is alcoholic fermentation, producing ethanol and carbon dioxide. The rise of dough with yeast and sugar is caused by that carbon dioxide, not by lactic acid.
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