How Does Temperature Affect The Rate Of Respiration In Yeast

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Yeast report
Essentially the growth and metabolism of any micro-organisms are profoundly affected by the temperature. For example, for Saccharomyces it’s said to increase the production of alcohol increases with temperature up to 40° (Brown 1914). Any organisms (in order to survive) require adenosine triphosphate (ATP), ATP is produced using cellular respiration. Cellular respiration are metabolic reactions that take place in order to produce ATP, which is essential for any cellular activities whether it is movement, work or temperature maintenance. Cellular respiration involves glycolysis followed by citric acid cycle including the Krebs cycle and oxidative phosphorylation. The most amount of ATP is produced in the Krebs cycle
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The maximum standard deviation of oxygen consumption for the 20 °C average is 119.86 and the minimum standard deviation was 94.56. Finally the maximum standard deviation for 37°C is 96.11 and the minimum standard deviation for this certain control group was 89.79. From figure 4 it is evident that the largest spread of data occurs in the yeast suspension, the maximum standard deviation for the 4 degrees group was 75.05 and the minimum standard deviation is 41.83. For the 20 degrees group the maximum standard deviation is 49.93 and the minimum value is -6.87. The range for the 37 degrees group ranges from -2.4 to 2.9.

Figure 4
Yeast suspension oxygen consumption % Minutes 4°C average 20 °C average 37°C average
0 82.3 83.7 4.63
1 78.9 56.56 4.3
2 74.96 32.1 0.96
3 70.56 15.46 0.9 4 63.96 7.96 0.76
5 57.46 5.26 0.63
6 53.2 3.83 0.53
7 49.13 3.63 1.03
8 45.3 6.4 0.3
9 41.53 3.56 0.3
10 38 1.83 0.3
Maximum rate 82.3 83.7 4.63
Total numbers 11 11
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If the environment of the yeast was too cold (4°c) the molecules will have a decreased amount of energy to function therefore they would slow down causing less reactions within the yeast to take place. Hence decreasing the rate of cellular respiration (alberts et al). On the other hand 37°c is not ideal temperature either because this would denature the enzyme within yeast which is known as zymase. Denaturation of the enzyme would completely halt the process (Palmer and Bonner, 2007) of cellular respiration . The Denaturation takes place at high temperatures at this point the shape of the active site is altered thus the substrate cannot fit in order to form a functioning enzyme. (Palmer and Bonner,
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