Question

A food stall owner added a pinch of yeast and sugar to the flour while preparing dough for making ‘bhaturas’ and kept the mixture in a warm place. After some time, he observed that the dough increased in volume.
i. Why did the dough increase in volume? Give reason
ii. Do you think that there is any change in smell and taste of dough?
iii. Name few similar phenomenon, we observe in making other food items.

Answer 1

Answer:

1.The C02 released during respiration by the yeast results in the rise of dough

2.During anaerobic respiration, yeast produces alcohol resulting in sour smell.

3.Sugar acts as food for yeast.

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