Question

Question 2 (e)
The bread or idly dough rises because of

a) heat
b) grinding
c) kneading
d) growth of yeast cells

Answer 1

The answer is (d).
The bread or idly dough rises because of growth of yeast cells.

Yeast is a living organism that is a part of the fungus family. This leavening agent makes bread or idly dough rise through fermentation. Fermentation in food processing is the process of converting sugars (carbohydrates) to alcohol by microorganisms such as yeasts or bacteria in the absence of air (anaerobic conditions).The yeast converts the sugar in the dough into carbon dioxide gas and ethanol (alcohol). The gas trapped in the dough makes it rise.