Yeast Fermentation Essay Example for Free

Yeast Fermentation EssayThe aim of this experiment was to investigate the effect of different amounts of a substrate on the respiration rate of yeast and to compare this to the effect of different amounts of glucose on the rate of yeast respiration. The substrate which I chose to further investigate was fructose. Fructose is a fruit sugar which is unrivaled of the three, along with glucose and galactose, dietary monosaccharides that are directly absorbed into the bloodstream during digestion.Materials2% yeast solutionLarge beakerSmall beakerConical flaskThermometer (C)Glass celestial polepH meter data loggerHot waterSensitive digital scale (g)Fructose (1.0g, 1.5g, 2.0g, 2.5g)Glucose (1.0g, 1.5g, 2.0g, 2.5g)Measuring cylinder (cm3)VariablesIndependent Concentration of glucose (1.0g, 1.5g, 2.0g, 2.5g) , intentness of fructose (1.0g, 1.5g, 2.0g, 2.5g) Dependent Amount of carbon dioxide produced, i.e. rate of yeast respiration Controlled 2% yeast solution (20cm3), initial temperatur e of yeast solution (35-40C), amount of period that the reaction is measured (180 seconds)Method20cm3 of yeast solution was measured using a measuring cylinder and thenpoured into a cone-shaped flask.1.0g of glucose was weighed on a digital balance.Hot wter was poured into a large beaker, and the conical flask containing the yeast was placed privileged with a thermometre inside.The conical flask was kept insideThe conical flask was held like this until the 2% yeast solution reached an initial temperature between 35-40C (specific temperature was noted down) When this temperature was reached, the thermometer was taken out of the conical flask and the conical flask out of the hot wate