FOOD PROCESSING AND PRESERVATION
FERMENTATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Soil, food, moisture
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Moisture, sugar, cool termperature
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Moisture, warmth, food
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Agar, sugar, moisture
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Detailed explanation-1: -Yeast must have three things in order to grow: Moisture, Food, and Warmth. To activate yeast the first step is called proofing and is a way to test the yeast to make sure it is alive and still active. This is accomplished by mixing the yeast in a warm liquid. In order for yeast to become very active it needs food.
Detailed explanation-2: -Most yeasts require an abundance of oxygen for growth, therefore by controlling the supply of oxygen, their growth can be checked. In addition to oxygen, they require a basic substrate such as sugar. Some yeasts can ferment sugars to alcohol and carbon dioxide in the absence of air but require oxygen for growth.
Detailed explanation-3: -They are single-celled fungi. There are about 1, 500 different species of yeast. Most reproduce asexually, by budding. Some use binary fission to reproduce asexually.