Question

Yeast is used for the production of-
a. Alcohol
b. Cake
c. Bread
d. All of the above

Answer 1

Hint: Ripening of yeasts, such as lactic acid bacteria, is also produced under strict hygienic conditions in specialised fermenters but with specific nutrient sources and growth parameters. Notably, the fermentation of the yeast must be carried out under aerobic conditions (with oxygen or air).

Complete answer:
Yeast has a large number of uses in the culinary industry. Yeast has been used for thousands of years to manufacture carbonation, alcohol, leaven bread, and to provide dietary supplements.

Yeast is the single-celled, eukaryotic fungus. The Saccharomyces cerevisiae is the widely used species of yeast. It is also known as baker's yeast, developed commercially from a sugar-rich nutrient source (usually molasses: by sugar-refining product).

The yeast is used to produce fermented foods, such as cakes, cookies, and alcohol. The organism transforms the fermentable sugars present in the substratum into carbon dioxide and ethanol (the alcohol in the wine is produced by the fermentation of the sugars in grape juice). The gaseous carbon dioxide makes the bread and cake dough moist and fluffy.

The bread and cakes have pores that are due to the carbon dioxide gas bubbles that get stuck during the baking process. Other ingredients in the mixture influence fermentation speed-sugar and eggs accelerate it; fats and salt slow it down.

Hence, The correct answer is option (D).

Note: Two primary uses of yeasts in food processing are: baking and producing alcoholic drinks. They have been used in this way since ancient times – there is evidence that ancient Egyptians used yeast in bread making, and for centuries we have been producing fermented beverages such as alcoholic beverages.