Q. In which one of the following processes is not released?

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Solution:

Anaerobic respiration or fermentation can be of two types, i.e., lactate fermentation and ethanol fermentation. Lactate fermentation produces lactic acid only as pyruvic acid produced in glycolysis is directly reduced by NADH to form lactic acid and no , is produced. Alcoholic (ethanol) fermentation involves conversion of pyruvate to acetaldehyde, hence, , is released.