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Effect of Different Substrates on Fermentation by Yeast Background: Yeast respire anaerobicly Glucose › ethanol + CO2 ( + 2ATP ) Aim: To find the effect of different substrates on fermentation by yeast. Apparatus: Bunsen Burner Boss Safety Mat Trough Tripod Stop Clock Gauze Scales Beaker Boats Thermometer Matches 6 Test Tubes Pipette Bung Spatula Delivery Tube Oil Measuring cylinder Yeast Water Substrates (Glucose, Fructose & Starch) Clamp Stand Diagram: Hypothesis: In my investigation I will change the different substrates & measure the amount of Carbon Dioxide gas collected. Using a monosaccharide (Glucose), a disaccharide (Fructose), and a polysaccharide (Starch) as the substrates. I think that the glucose will produce the most Carbon Dioxide gas, as it is a monosaccharide, and will be easier to break down as it has fewer bonds to break. We do not know what yeast can do, we know that it can break down glucose, but we do not know if it can break down starch into glucose to release carbon dioxide. So this experiment should help me to see what yeast can do. Plan: Collect and set the apparatus...

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