Question

Give reasons- Sugar solution produces identifying smell when yeast is added ?

Answer 1

Correct option is

A

Ethanol

When yeast has both sugar and oxygen available to it, it undergoes aerobic respiration to produce energy, water and carbon dioxide. In the absence of oxygen, yeast switches over to a process called anaerobic respiration during which, sugar is fermented to produce energy, carbon dioxide, and ethanol. Yeast that produces ethanol from the sugar has a characteristic smell and this process is generally used to ferment wine.

So, the correct answer is 'Ethanol'.