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 few hours, the dough had risen. There was a sour smell too.
- Why did the dough rise?
- Why did the dough smell sour?
- Why was sugar added to the dough?
- What would have happened if the dough was kept in the refrigerator, soon after
it was prepared?
- The C02 released during respiration by the yeast results in the rise of dough.
- During anaerobic respiration, yeast produces alcohol resulting in sour smell.
- Sugar acts as food for yeast.
- At low temperatures, yeasts will not multiply and respire because of which the dough will not rise or become sour.