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Effect of temperature on membrane permeability

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  • Essay length: 2306 words
  • Submitted: 19/06/2006
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University Degree Cell Biology

The first 200 words of this essay...

Effect of temperature on membrane permeability

Aim

This investigation aims to determine what effect an increase in the surrounding temperature has on the plasma membrane of a typical plant cell structure.

Hypothesis

An increase in temperature will damage and denature the plasma membrane, which would cause the substances contained within the cytoplasm to leak out of the membrane.

The investigation carried out was to see the "effect of temperature on membrane permeability". Different temperatures were used, ranging from room temperature to 87°C. Three test tubes were used to give a range of results. They were placed in a colorimeter, from which a percentage was recorded showing how much light had passed through. Figure 1 shows the results obtained from the investigation. A mean has also been calculated and included in the results.

Temperature (°C)

Test tube 1 (%)

Test tube 2 (%)

Test tube 3 (%)

Mean (%)

23

98

96

96

96.67

45

95

93

91

93.00

53

74

73

73

73.33

65

54

45

34

44.33

87

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