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The effect of temperature on the survival of yeast cells
Member rating: No Rating | Words: 1828 | Submitted: Mon Apr 14 2008
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PLANNING EXERCISE The effect of temperature on the survival of yeast cells. The aim of my investigation is to find the lowest temperature that kills all the yeast cells in a suspension of either dried or fresh baker's yeast. I predict, as yeast cells contain enzymes and enzymes usually only functions best at about body temperature, which is 37oC. As the temperature increases from 40oC, the function of enzymes starts to slow as they begin to denature till it reaches about 50oC. Any temperature above this will denature the enzymes and therefore kill them. In this case, I also predict that the lowest temperature range that would kill all the yeast cells is roughly between 10oC and 60oC. BACKGROUND INFORMATION Yeast is a member of the fungus family and is a single-celled organism. Baker's yeast as well as brewer's yeast is similar in that they belong to the same species called the saccharomyces cerevisiae. Yeast cells...
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