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What regulates the action of yeast?
Directly regulated by sugar and salt. Sugar cuases yeast growth, salt slows. Environmental factors such as moisture, heat and acidity also affect yeast growth.
How does sugar affect carbon dioxide realeased byyeast and warm water?
Yeast can use oxygen to release the energy from sugar (like you can) in the process called respiration. So, the more sugar there is, the more active the yeast will be and the faster its growth (up to a certain point - even yeast cannot grow in very strong sugar - such as honey).
3 factors which affect the growth in yeast?
temperature (30 degrees celcius is the optimum temp for yeast growth), nutrients (e.g. sucrose, fructose, glucose, lactose - (does not affect yeast growth), pH level (5 - 6 is the optimum pH level for growth)
Does temperature affect yeast growth?
Yes.
What affects the yeast growth?
Temperature of its environment, amount of sugar, type of sugar, and acidity.
Does yeast grow faster or slower with more sugar?
Yeast is a bacteria that feeds on sugar, which causes the fermentation process. In the process of wine making, grapes have yeast in the skin and sugar in the flesh of the fruit, the yeast then feeds on the sugar in the flesh fermenting the juice and making the wine.
Does the amount of sugar affect fermentation?
Yes, because the yeast feeds on sugar. Fermentation cannot continue if there is not sugar as the yeast will not be able to convert it to alcohol and carbon dioxide.
Is sugar necessary for growth and division of yeast cells and algae cells?
Yes.
What makes yeast grow fastest sugar honey or syrup?
Yeast grows fastest with sugar because it is a simple carbohydrate that can be easily metabolized by the yeast for energy. Honey and syrup may contain other components that could possibly slow down the growth of yeast compared to pure sugar.
Will letting water-sugar-yeast mixture ferment for long time affect the quantity of ethanol produced?
Letting a water, sugar, and yeast mixture ferment for a long time does not affect the quantity of ethanol produced.
Does yeast grow differently in sunlight than in darkness?
Yeast does not require sunlight for growth as it does not photosynthesize. Yeast grows best in a dark, warm, and moist environment with a source of sugar for fermentation. While sunlight won't harm yeast, it is not necessary for its growth and reproduction.
Why sugar is important to the growth of yeast?
This is actually not a chemical reaction. Yeast are living organisms and they use sugar as an energy source, so if you put yeast and sugar together the yeast will consume the sugar and give off carbon dioxide. This is why breads made with yeast rise and have small holes in the bread after it is baked - the holes are where small bubbles of carbon dioxide were trapped.
