Question

Question 2
Yeast is used in wine and beer industries because it respires

(a) aerobically producing oxygen
(b) aerobically producing alcohol
(c) anaerobically producing alcohol
(d) anaerobically producing $C{O}_2$

Answer 1

The answer is (c).

• Yeast is a fungus which respires anaerobically to produce alcohol.
• In the absence of oxygen, yeast converts the sugars of wine grapes into alcohol and carbon dioxide through the process of fermentation.
• Hence it has such wide applications in the wine and beer industry.