The conversion of glucose into alcohol mainly depends on yeast fermentation, that is, the process of anaerobic respiration.

The specific change process is as follows

C6H 12O6+H2O- (yeast)->; CH3COCOOH (pyruvate)->; C2H5OH (alcohol)

In the first layer, enzymes are not bacteria, but bioactive proteins or polypeptides, not organisms.

Fermentation yeast is not a bacterium, but a fungus.