Aim: Investigation into the effect of temperature on membrane permeability Apparatus:
Method:
Health and Safety:
The below three photos are credited to Henry Gould Analysis of results:
My class and I found that our graphs showed a negative correlation. This means that as the temperature increased, the transmission or percentage of light allowed through the solution decreased (visually this means the solution got darker). This is because more pigment has been leaked from the beetroot into the surrounding solution. This is because the higher temperatures have caused the plasma membrane and tonoplast of the beetroot cells to move around more from the increase in kinetic energy and for some vital membrane proteins to denature allowing more pigment out of the vacuole and then out of the cell. Questions:
5 Comments
Hassan
20/10/2020 06:33:15 pm
Why does there have to be the same amount of water in each tube when doin the beetroot practical .
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belle
11/12/2020 12:10:43 pm
1) if too much water , the concentration of pigment in solution will be lower = so the solution will appear lighter.
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Oscar
30/1/2024 09:15:32 pm
It's a controlled variable. To ensure results are accurate and reliable.
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Oscar
30/1/2024 09:17:07 pm
It's a controlled variable. To ensure results are accurate and reliable. If they weren't left for the same amount of time you might get different results.
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March 2017
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