Question

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

Answer 1

D.) ⤴️ B.)

C.) The C02 released during respiration by the yeast results in the rise of dough. During anaerobic respiration, yeast produces alcohol resulting in sour smell.

A.) Bread rises because yeast eats sugar and burps carbon dioxide, which gets trapped by the bread's gluten. The more sugar your yeast eats, the more gas that gets formed, and the higher the bread rises!