Assertion : Yeasts such as Saccharomyces cerevisiae are used in baking industry. Reason : Carbon dioxide produced during fermentation causes bread dough to rise by thermal expansion.

Step-by-step solution

Yeast such as Saccharomyces cerevisiae is used in baking industry. The yeast ferments glucose to yield ethyl alcohol and carbon dioxide. This carbon dioxide is used in baking industry for raising dough. Kneading, stretching and folding of the dough develops the protein structure to improve its elastic properties and its ability to hold gas. This improved gluten properties enable better retention of the gases within the dough as the structure expands and the cell walls become thinner.