Alcohol Fermentation by Yeast

Alcohol Fermentation by Yeast : 

Alcohol Fermentation by Yeast Presentation by: Myrah Griffin, Priya Dixit, Christiana Eltiste, and Chris Johnson

Introduction : 

Introduction Several products such as alcoholic beverages and many types of bread use the method known as fermentation (Raven 2011). Aerobic  Final electron acceptor is oxygen. Anaerobic respiration  Final electron receptor is an organic molecule (Raven 2011).

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Fermentation Takes place in unicellular fungi. This occurs in yeast (commonly) which is mainly used for baking (e.g. bread). Saccharomyces cerevisiae  baker’s yeast. Yeast switches from aerobics respiration to anaerobic respiration when the amount of oxygen is low. Decarboxylation Release of CO2 as a product.

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Carbon Dioxide  trapped in the yeast  forces the bread to rise due to the pressure of the CO2 molecules (Morgan and Carter 2008). CO2 gas causes a water bubble to move upwards when the pipette is inverted. Enzymes have much to do with the rate of a reaction. Temperature and concentration of yeast are some factors that can affect the enzyme (Raven 2011).

Methods and Materials Used : 

Methods and Materials Used

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A graduated cylinder was used to measure the liquids. Note: We swirled the yeast solution before measuring out the 10 mL. We allowed the flask to incubate for 5 minutes. We made a respirometer for the solution, and took measurements of the water droplet at 1 minute intervals for 5 minutes.

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Grow Force

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Independent Investigation Note: We swirled the yeast solution before measuring out the 10 mL. A graduated cylinder was used to measure the liquids. We allowed the flasks to incubate for 5 minutes.

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We made respirometers for each solution, and took measurements of each water droplet at 1 minute intervals for 5 minutes. Grow Force

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The experiment was replicated 3 times. The data was recorded in a table!

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Syringe Pic Grow Force. http://www.growforce.co.uk/product_images/1061/1/10-cc- plastic-syringe.jpg THIS SLIDE IS JUST SO YOU KNOW WHERE I GOT THE PICTURE FROM!!!! PUT THE SITE IN THE LITERATURE CITED SLIDE!!!