The most common substrate used in distilleries for the production of ethanol is?

The correct option is A

Molasses

The correct answer is Option A.

The explanation for the correct answer:

1. Through a biological process known as molasses fermentation, the sucrose in molasses is transformed into cellular energy, which ultimately results in the production of ethanol and carbon dioxide.
2. The industrial yeast Saccharomyces cerevisiae possesses the majority of the desirable fermentation characteristics, including fast growth and fermentation rates, osmo-tolerance, high ethanol tolerance, the ability to ferment molasses, and the ability to ferment at high temperatures.
3. Molasses can also be used as a by-product for fermentation into rum.

Final answer: The most common substrate used in distilleries for the production of ethanol is molasses.