Question

Yeast die when alcohol concentration reaches about $13$%, still Yeast perform alcoholic fermentation why?

• A. To obtain ATP
• B. Utilization of $O_2$
• C. For oxidation of $NAD{H}_2$
• D. Obligate aerobic

Answer 1

The correct option is A To obtain ATP

Yeast is an unicellular eukaryote that undergoes anaerobic respiration in order to produce ATP for cellular energy and alcohol (low levels) as a byproduct. Yet alcohol (above 10%) kills yeast as they function as a disinfectant by dissolving the membranes of Yeast.

So the correct answer is "To obtain ATP".