Question

Which of the following is included in vinegar fermentation?

(a) Transform sugar into alcohol, by yeast

(b) Change alcohol into acetic acid using vinegar bacteria

(c) Transform sugar into alcohol, by yeast & Changing alcohol into acetic acid using vinegar bacteria

(d) Neither of the mentioned

This question was addressed to me in exam.

I'd like to ask this question from Principles of Food Preservation by Fermentation-2 topic in chapter Principles of Semi-Moist Foods, Principles of Food Preservation by Fermentation, Principles of Food Pickling and Curing and Principles of Food Storage Stability of Food Engineering

Answer 1

Right answer is (c) Transform sugar into alcohol, by yeast & Changing alcohol into acetic acid using vinegar bacteria

Explanation: In Vinegar fermentation, first, sugar is transformed into alcohol, by yeast. This is followed by changing alcohol into acetic acid using vinegar bacteria. The second process can only start after the first one has ended.