Yeast Experiment Essay

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C1: The table of results and graph representing personal results obtained in the experiment show that the mean no. of yeast cells per mm3 in a glucose respiratory substrate are 4 x 10, whereas the mean no of cells in sucrose substrate are 1 x 10. In comparison, the average class results indicate that the mean no. of yast cells per mm3 in glucose solution is 7.5 x 10, whereas for the sucrose solution the mean no. is 1.7 x 10. The provided results for fructose show that the mean no. of yeast cells is 3.6 x 10 and for maltose it is 4.9 x 10. C2: As indicated by the table of personal results, maltose was the best/most effective medium for growth of yeast cells and sucrose was the least efficient medium. Nevertheless, the class results suggest that glucose is the most effective respiratory medium for growing of yeast cells while sucrose remains the least growth-promoting respiratory substrate. C3, C4, C5 The process of cell division in all fungi (including yeast cells) is ‘budding’. It involves a division of a grown cell (which has reached its’ critical size) into two daughter cells. A weakening of the cell wall and along with the tension exerted by turgor pressure extrusion of cytoplasm into an area bounded by new cell wall material is allowed. Yeast cells, just like all respiring cells, require energy in the form of ATP for cell division/growth. Because of the fact the experiment was carried out in aerobic conditions, yeast was able to respire using oxygen from the air to transfer the energy from carbohydrates to ATP and allow growth. The following equation summarizes the chemical changes that occur in cellular respiration (in the cytoplasm of the yeast cell) of the monosaccharide glucose when oxygen is available A crucial step of respiration in this experiment is glycolysis of the glucose molecule into two pyruvate molecules which generate energy in the
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