• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month
Page
1. 1
1
2. 2
2
3. 3
3
4. 4
4

# The effect of Temperature on membrans

Extracts from this document...

Introduction

The effect of temperature on the membranes For this experiment, I will be testing the effect of temperature on the membranes of beetroot. Beetroot cells are like any other eukaryotic cells, and have just like any other cell, the standard organelles present needed for the cell to function correctly. Some of the organelles are bounded by a single membrane, while others are bounded by two membranes. The aim of this experiment is to test how different temperature will affect the overall structure of the membrane, and how the beetroot will be affected by the varying temperature. I will test how by heating beetroot slices of the same size at a varying temperature how the heat affects the cell membranes. The independent variable will be the temperature of the water surrounding the beetroot slices, because I have full control over this variable, while the variable that I will keep constant will be the size of the 8 pieces of beetroot that I'll use. The dependant variable that will occur will be the effect on the beetroot as it is dependant on the temperature if a higher or lower temperature has an effect on the slices. ...read more.

Middle

30 minutes is enough for the temperature to fully boil and have a full affect on the membrane of the beetroot. 6) After the 30 minutes, remove the boiling tubes and shake the test tubes to liquefy the pigment in the water 7) Place them in the test tubes racks 8) In order to document the change, one uses the pipette to measure 2cm^3 of the water and dye solution. 9) Place each sample into the colorimeter and measure the absorbency of each beetroot as shown on the monitor on the colorimeter. Below are the results I obtained from the experiment. Temperature How much it absorbed 0 0.17 10 0.1 20 0.06 30 0.07 40 0.1 50 0.25 60 0.3 70 1.15 From this set of results, I manipulated them into a visual graph in order to see the results a lot more clearly. 0 10 20 30 40 50 60 70 By looking at my results, one can see that there is a steadily increasing rate of percentage absorbed correlating with the temperature increased. The amount absorbed was measured by the colorimeter, in which is a reliable measurement to base my recordings on. ...read more.

Conclusion

To avoid this next time, there should be more than one person working on the experiment in order to collect an accurate account of results. There were also many random errors that may have occurred during the conduction of my experiment. Because the readings on the colorimeter were very reliable and accurate as it was a machine reading, I felt fully confident that these results were as accurate as they could be. The only other thing that I could have easily got wrong was when I was meant to shake the test tube gently. I had no general idea how much I was shaking each test tube to mix up the dye and pigment solution, and could have shaken one test tube more than the other, giving some of them an unfair reading on how much it had been absorbed. Furthermore, the colorimeter, although I'm very sure it was fine, could have not been functioning properly. Taking this into consideration, I could have repeated the experiment to obtain much more results. Overall, I can conclude by saying that this experiment proved my prediction with the use of biological knowledge and reliable results. I can successfully conclude by saying that the change in temperature will change the overall structure in the beetroot membrane by making it more permeable the more the temperature increases. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Molecules & Cells section.

## Found what you're looking for?

• Start learning 29% faster today
• 150,000+ documents available
• Just £6.99 a month

Not the one? Search for your essay title...
• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month

# Related AS and A Level Molecules & Cells essays

1. ## Investigating the effect of temperature on the movement of pigment through beetroot cell membranes.

4 star(s)

These are shown in detail in Fig. 3 below. In the formation of the bilayer the hydrophilic faces outward towards outside the cell and into the cytoplasm, while the hydrophobic tails face inwards within the bilayer. The effect of this being that the tails are non-polar, so it is difficult for polar molecules, or ions, to pass

2. ## effect of temperature on beetroot pigment through membrane

3 star(s)

Remove the Co test tube. Wipe a sample test tube and place into the colorimeter, secure the cap and record the result. 10. Re-calibrate the colorimeter using the C1 test tube adjusting the percentage of transmission to 100% and repeat Step 9 for each sample test tube.

1. ## An investigation to examine the effects of temperature on membrane stability in beetroot, by ...

3 star(s)

of pigment that leaks out of the beetroot samples within different temperatures. We assume that the pigment that is in beetroot is anthocyanin. Anthocyanins are representatives of a large group of flavorous plant pigments responsible for most of the red, blue, and intermediate colours of flowers and fruits attracting insects

2. ## The effect of temperature on the permeability of beetroot membrane

3 star(s)

40�C, 50�C, 60�C, 70�C and 80�C at will be carrying out the experiment 3 times for each temperature. * Communicate an ordered sequence to follow procedure (noting any safety issues) o Cut the beetroot specimens using a size 5 corer o Measure the length of the cut beetroot cutting them

1. ## TEMPERATURE ON BEETROOT PERMEABILITY

And there's no point shaking the test tube after the beetroot is removed because no betalain pigment will be released. All this will make the result less accurate. Whereas if the beetroot is shaken before pouring it out into the cuvettes, then there's assurance that all leaked betalain pigments from the damaged membrane are used for the light transmission calculation.

2. ## Determine what effect with an increase in the surrounding temperature has on the plasma ...

amino acid with OH group 4) Hydrophobic-they are non polar amino acid with CH2 and CH3. These properties help the influence the shape and therefore the function of any protein they make up. Model of a Cell Membrane Input Variable How it affect the investigation Temperature ( Change) This is what I am going to investigate.

• Over 160,000 pieces
of student written work
• Annotated by
experienced teachers
• Ideas and feedback to
improve your own work