Yeast Lab Report
* Would yeast produce more carbon dioxide with the presence of sugar at room temperature or in an incubator? | -Observing Cellular respiration in yeast cells. |
Yeast Lab
Background Information: Yeast is a tiny unicellular fungus that obtains energy from outside sources (a heterotroph) mostly sugars in order to grow and reproduce. Yeast is often used in bread dough to make the dough rise. With the presence of oxygen a yeast cell creates energy by performing cellular respiration and producing a high amount of ATP, but when in bread dough the absence of oxygen causes the yeast to perform alcoholic fermentation. The yeast breaks down sugars in the dough through glycolysis and alcohol fermentation and produces a small amount of ATP, will also release carbon dioxide. The carbon dioxide produced by alcoholic fermentation causes the dough to rise. Carbon dioxide is made by yeast as a waste product and the quantity of carbon dioxide is a sign of growth. Yeast organisms’ size and quick reproduction make them great for testing different factors such as temperature, which is what will be tested in this lab.
Purpose and Question: The ideal temperature for yeast growth is between 30 and 35 degrees Celsius depending on the type and if there is a sufficient food source. The lab will test whether yeast would release more carbon dioxide provided that there was sugar at room temperature or in an incubator? The incubator will be set at 37 degrees Celsius and the room temperature is 22 degrees Celsius. -Would yeast produce more carbon dioxide with the presence of sugar at room temperature or in an incubator?
Hypothesis:
-If one syringe is put in the incubator and the other at room temperature then the syringe at room temperature would rise more because the incubator would be too hot for the yeast to adapt as quickly as the syringe set at room temperature.
Variables:
* Independent variable- Temperature. * Dependent variable- ml of CO2 produced. *
Yeast Lab
Background Information: Yeast is a tiny unicellular fungus that obtains energy from outside sources (a heterotroph) mostly sugars in order to grow and reproduce. Yeast is often used in bread dough to make the dough rise. With the presence of oxygen a yeast cell creates energy by performing cellular respiration and producing a high amount of ATP, but when in bread dough the absence of oxygen causes the yeast to perform alcoholic fermentation. The yeast breaks down sugars in the dough through glycolysis and alcohol fermentation and produces a small amount of ATP, will also release carbon dioxide. The carbon dioxide produced by alcoholic fermentation causes the dough to rise. Carbon dioxide is made by yeast as a waste product and the quantity of carbon dioxide is a sign of growth. Yeast organisms’ size and quick reproduction make them great for testing different factors such as temperature, which is what will be tested in this lab.
Purpose and Question: The ideal temperature for yeast growth is between 30 and 35 degrees Celsius depending on the type and if there is a sufficient food source. The lab will test whether yeast would release more carbon dioxide provided that there was sugar at room temperature or in an incubator? The incubator will be set at 37 degrees Celsius and the room temperature is 22 degrees Celsius. -Would yeast produce more carbon dioxide with the presence of sugar at room temperature or in an incubator?
Hypothesis:
-If one syringe is put in the incubator and the other at room temperature then the syringe at room temperature would rise more because the incubator would be too hot for the yeast to adapt as quickly as the syringe set at room temperature.
Variables:
* Independent variable- Temperature. * Dependent variable- ml of CO2 produced. *