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AT1 GCSE Practical Assessment Anaerobic Yeast Respiration Aim The aim of our experiment was to investigate one possible factor which could affect the rate of yeast respiration. Preliminary Work To provide an insight into our investigation, we researched some preliminary work which has previously been done. The preliminary researchers had altered both the temperature of the yeast, and the concentration of the glucose in the yeast. This was beneficial to our experiment because we could clearly see which of these two variants would give us the more interesting and fruitful experiment. The results of these preliminary experiments can be observed below: Temperature Of Yeast (ºC) Concentration of Glucose (ml) Time Left Respiring (minutes) CO2 Produced (ml) Control 21.0 1.5 5.0 2.0 Increased Glucose 21.0 2.0 5.0 0.5 Increased Temperature 35.0 1.5 5.0 6.2 From this table, we can clearly see that varying temperature will create more varied results. The more varied the results, the more we will be able to document in this write-up. From this preliminary work, we have decided to focus our experiment on alterations to the temperature. Prediction...

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