TED-Ed: The beneficial bacteria that make delicious food - Erez Garty

The video explores how microorganisms like yeast and bacteria contribute to the characteristics of various foods. Yeast is used in bread and winemaking, where it ferments sugars to produce carbon dioxide and alcohol. Bacteria play a role in wine flavor and vinegar production by converting compounds in the presence of oxygen. In cheese making, bacteria and enzymes like rennet help curdle milk to form cheese. The video highlights the diverse applications of microorganisms in food production, including yogurt, soy sauce, and more.

What is the primary role of yeast in bread making?

• To make the bread sweeter

• To increase the nutritional value

• To produce carbon dioxide for leavening

• To add flavor

How do winemakers ensure consistent results in fermentation?

• By using wild yeasts only

• By adding sugar to the grape juice

• By increasing the oxygen levels

• By adding selected strains of yeast

What compound do acetic acid bacteria produce in the presence of oxygen?

• Ethanol

• Lactic acid

• Acetic acid

• Carbon dioxide

What is the role of rennet in cheese making?

• To increase the shelf life

• To add flavor

• To help curdle the milk

• To make the cheese softer

Which of the following foods is not typically associated with fermentation?

• Kombucha

• Soy sauce

• Pasta

• Yogurt