What is the effect of temperature on the permeability of beetroot cell membranes?

Essay by horsey11C+, June 2004

download word file, 3 pages 5.0

Downloaded 86 times


Independent Variable- Temperature is what I will be changing in the experiment. I want to find out what effect temperature has on the permeability of a cell membrane.

Controlling other Variables- I will use measures to ensure that everything stays the same in my test to gain the best and most reliable results possible

- Same volume of water that I put the beetroot into after heating.

- The beetroot I use will be the same size each time, I will ensure this using a cork borer.

- The beetroot will be heated for the same time for each one, also it will be left in the water for the same time after.




Heat proof mat


Bunsen Burner

Cork Borer

10 Beetroot cylinders


10 test tubes


Measuring cylinder

Also to improve the reliability of the test I will repeat the results.


- Heat 200ml of water in a beaker

- Whilst water is heating, place 10cm3 of water into each of ten test tubes.

Label 85-45 and place in a water bath at 20 degree Celsius

- Cut beetroot with a cork borer to length of 5cm. Use a borer with a diameter of 1cm

- Place the beetroot cylinder into a beaker of water at 85 degrees, after one minute use forceps to transfer to test tube of water in water bath at 20 degrees celsius

- As water in beaker cools repeat step 3 using fresh cylinder of beetroot.

- Complete this cycle for 10 cylinders

- Leave each cylinder in its test tube for 30 minutes

- After 30 minutes remove beetroot and shake solution well to get the best quality colour

- Take the solutions and transfer to small beakers and place into the colorimeters, change the setting...