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What is anarobic respiration
Anaerobic respiration is cellular respiration that occurs without oxygen. The process of anaerobic respiration begins with breaking down glucose (sugar molecules) that produces pyruvic acid. The pyruvic acid then undergoes a fermentation process to produce ATP, which cells employ for energy production. In anaerobic respiration (which occurs during fermentation), less energy is extracted (only 2 ATP molecules per glucose molecule) because the products of the process, such as ethanol, contain more energy than does carbon dioxide, the product of aerobic respiration. In muscle, the product of anaerobic respiration is lactic acid. In yeast, it is ethanol.

Both aerobic and anaerobic respiration begin with glycolysis to produce pyruvic acid, but thereafter the pathways differ.


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