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Practical #3 Multiplication of yeast cells in aerobic and anaerobic conditions Introduction: On hand-out Hypothesis: On hand-out Materials / Apparatus List: Three conical flasks: 100ml 250ml 500ml Pipette Apple juice/yeast solution (provided by Dr. Hebel) Light microscope Haemocytometer Special slide with grid (included with the haemocytometer) Cover slips (included with the haemocytometer) Slide Counter (to count the number of yeast cells. Not necessary but useful) Water bath Rubber bands and tissue (to seal the flasks for the 2nd of the experiment) Methods: On hand-out Variables: Independent --> Size of the flask Surface area of flask Dependent --> Number of cells pr. ml. Data collection: In order to have a fair experiment, we chose to count the number of yeast cells in completely random blocks rather to count the blocks systematically. The reason for this is if we chose randomly, we would have a clearer view of the true number of yeast cells, also it could have been that the yeast cells were not distributed evenly in the...

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