What is the primary difference between fermentation and anaerobic respiration?

Fermentation:

Fermentation may be defined as the process of conversion of sugar into alcohol and carbon dioxide with the help of microorganisms. This process mainly occurs in the limited supply of oxygen. This is mainly an extracellular process.

Anaerobic respiration:

Anaerobic respiration may be defined as the process of a cellular respiration of an organism. This process mainly occurs in the complete absence of the oxygen. The anaerobic respiration is completely an intracellular process.

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