Question

5. A food stall owner was preparing batter for making idli/dosas. He added a pinch of yeast and sugar to
the batter and left it in a warm place, After few hours, the batter had risen with sour smell.
a) Why did the batter rise?
b) Why did the batter smell sour?
c) Why was sugar added to the batter?
d) What would have happened if the batter was kept in the refrigerator, soon after it was prepared?​

Answer 1

Answer:

a)The carbon dioxide released during respiration by the yeast results in the rise of dough.

b)during anaerobic respiration, yeast produces alcohol resulting in sour smell.

c)Sugar acts as food for yeast.

d)At low temperatures, yeasts will not multiply and respire because of which the dough will not rise or become sour.

Explanation: