Wine turns sour because of :-

Options

A. Heat
B. Aerobic bacteria
C. Anaerobic bacteria
D. Exposure to light

Answer

B

Explanation

Wine turns sour because ethanol convert to acetic acid by acetobacter aceti which is an obligate aerobe which means it requires oxygen to grow. It is economically important because it is used in the production of vinegar by converting the ethanol in wine into acetic acid. The ethanol i.e alcohol content of the wine, is oxidised, by the oxygen in the air into ethanoic acid.