preview

Yeast Fermentation Lab Report

Decent Essays

Purpose The purpose of this experiment is to estimate the rate of fermentation as it relates to the rate of carbon dioxide production by investigating alcoholic fermentation in a yeast. We will be doing this by using different amounts of yeast and glucose concentration in test tubes and seeing which tube produces the highest amount of fermentation. The amount of present in each test tube will determine if there is fermentation present in the solution. We will then use the data from this experiment to prove or disprove our hypothesis and see what different amounts of yeast and glucose does to the production of fermentation. Cellular respiration is composed of three steps, glycolysis, the Krebs cycle and the electron transport chain. Glycolysis is the first step of cellular respiration, which occurs in the cytoplasm and produces energy in the form of ATP. Glycolysis is the “process in which one glucose molecule is broken down to form two molecules of pyruvic acid” (cliffnotes, cellular …show more content…

For our first test tube, which only contained DI water and glucose, it did not produce a lot of . Our initial reading for the first test tube started at 0ml, and as the twenty minutes passed by, the amount of evolved only decreased by a range of 0.020ml and 0.026ml. For our second test tube, which contained 6ml of water and 1ml of yeast, it did not produce any . For the third test tube, which contained 3ml of water, 1ml of yeast and 3ml of glucose, there was some present, because it produced some bubbles. Our initial reading started at -0.02 and the evolved from this test tube ranged from 0.03ml and 0.04ml. Our final test tube, which contained 1ml of water, 3ml of yeast and 3ml of glucose produced the most . The graph below shows how much evolved was found in each test tube, and as shown, test tube four produced the highest amount of

Get Access