Question

Describe two way in which yeasts are useful to humans.

Answer 1

Yeast, the most common one being S. cerevisiae, is used in baking as a leavening agent, where it converts the food/fermentable sugars present in dough into the gas carbon dioxide. This causes the dough to expand or rise as gas forms pockets or bubbles. Surprisingly you can also use yeast for skincare and hair products.

Answer 2

Hope this helps. Good luck