Question

Alcohol can be converted into vinegar by the action of micro-organisms called:

(a) viruses (b) yeast (c) protozoa (d) bacteria

Answer 1

The correct option is option (d):

Explanation for the correct option:

1. The conversion of alcohol into vinegar is called acetic fermentation.
2. This process is done by Acetobacter bacteria.
3. These bacteria convert ethyl alcohol into vinegar in presence of oxygen.

Explanation for incorrect options:

Option (a):

Viruses are pathogens which cause many diseases in organisms.

Option (b):

Yeast is fungi which help in the process called fermentation i.e., conversion of sugar into alcohol.

Option (c):

protozoans are protists which important to maintain the fertility of soil.

Final answer: Bacteria help in the conversion of alcohol into vinegar.