What causes bread dough to rise?

1 Answer
May 20, 2017

The carbon dioxide gas produced by yeast during alcoholic fermentation causes bread dough to rise.


Yeast undergo alcoholic fermentation, during which ATP, carbon dioxide gas, and ethanol are produced.

In the diagram below, glycolysis is the first step and produces ATP and pyruvic acid , or pyruvate , which is converted to acetaldehyde by the enzyme pyruvate decarboxylase, which produces #"CO"_2# . The acetaldehyde is converted to ethanol by the enzyme alcohol dehydrogenase.