• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Movement of Pigment through Cell Membranes

Extracts from this document...

Introduction

Investigation Movement of Pigment through Cell Membranes Aim The aim of the investigation is to identify the effect of temperature of the movement of pigment through cell membrane of beetroot cells. Prediction and Reasoning I predict that the temperature will effect the movement of the beetroot pigment through the cell membrane. I believe an increase in temperature would result in an increase in the amount of pigment being released out of the cell. I base my prediction on the fact that an increase in temperature would provide the pigment molecules with more kinetic energy and therefore the rate of diffusion will increase. The increase in temperature would also denature (damage or change the characteristics of) the cell membrane resulting in more pigment being lost. Allowing the pigment to diffuse more rapidly throughout the two dimensional surface of the membrane. In the diagram the pigment from the beetroot (section A) would pass more readily into the water (section B) if it had more energy and also would pass quicker if the membrane becomes denatured by the increased kinetic energy of the molecules and the high temperatures. ...read more.

Middle

Leave each beetroot cylinder in its beaker for exactly thirty minutes. Once the thirty minutes are over shake the test tube and remove the cylinder. Do this for all ten test tubes and you should end up with ten test tubes containing water stained pigment from the beetroot. Finally place each solution into its own corvette and place it into to the colorimeter and record the readings. Diagram Variables The variables included in this experiment are as follows: -The temperature of the beaker. -The amount of beetroot added. -The duration of time the test tubes are in the warm beaker. The variable which we chose to look at in more depth was the temperature of the beaker which would heat surrounding water in the test tube to where there would be a net movement of pigment. From this we can determine what the best temperature is for diffusion to take place. Fair Test It is vital that a fair test is carried out otherwise the results would be misleading and lead to a false conclusion and evaluation. To help make this investigation a fair test each substance and solution was measured accurately and to the nearest possibilities. ...read more.

Conclusion

have been much more reliable and much more accurate as an average result could have been found which would have reduced the amount of anomalies appearing. A few anomalies did appear in the results this could have been down to the colorimeter and the amount of water there was in the cuvette before placing it in the colorimeter as this varied. Suitability of evidence and improvements As we used a range of ten different temperatures the results would have been more reliable as if a anomaly appeared it would be clearly spotted within the results. Changes or improvements that could be made if I was to carry out the experiment again are that I would make sure that each beetroot cylinder would have been the exact same length, weight and thickness. Also I would make sure I had a much better way of measuring the amount of light absorption as the colorimeter was unable to measure some of the values correctly. Further Work For further work I would use different substances which would allow me to compare beetroot to another substance and therefore allow me to see hoe different substances actively different substances allow the movement of pigment through cell membranes. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Green Plants as Organisms 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

See related essaysSee related essays

Related GCSE Green Plants as Organisms essays

  1. Marked by a teacher

    How does temperature affect the permeability of a cell membrane in a beetroot.

    4 star(s)

    As the temperature increased more anthocyanin could be released in the 10 minutes allowed to release the pigment into the water. A copy of the graph using my results is below. As you can see from this graph my results give a definite negative correlation this means that the percentage of transmission becomes lower as the temperature increases.

  2. An investigation in to the effect of temperature on the release of pigment from ...

    I predict this to be the main cause of any increase of release of red pigment at the start of the application of temperatures (i.e. from 10 to about 40 degrees Celsius). From above about 40 -50 degrees Celsius, I believe that the damaged structure of the membrane and the

  1. How Temperature Effects the Movement of Pigment Through Cell Membranes

    Phospholipids form the bilayer, which is the basic structure of the membranes. Because their tails are non-polar, it is difficult for polar molecules, or ions, to pass through them, so they act as a barrier to most water-soluble substances. The cholesterol molecules, like the phospholipids, have a hydrophilic head and

  2. Effect of Temperature On the Movement of Pigment Through Cell Membrane

    * Watch out that you don't break any glass apparatus to prevent cutting METHOD: * Using a cork borer and scalpel make 10 cylinders of beetroot of 5 cm length. * Heat 200 cm3 of water up to 85 �C in 250 cm3 beaker (make sure that thermometer is in the water).

  1. An experiment to test the effect of different temperatures on the permeability of cell ...

    get more permeable with increasing temperature is that the protein would get denatured. This means that temperature and permeability are not in direct proportion, but the ratio would change when it gets above 40�C when permeability increase more per amount of temperature increased.

  2. Investigation into the diffusion of pigment from the cell membrane of Beetroot.

    Scalpel - To produce accurate cuts of the beetroot. Ruler - To accurately measure the size of the pieces of beetroot, allowing extremely similar sized beetroot pieces. Stopwatch - To monitor/check how long the beetroot has been in the water, ensuring each piece gets the same amount. Each test will last for 10 minutes.

  1. Study the effects of temperature on the movement of the red pigment Anthocyanin through ...

    Also when I am heating the boiling tubes in the water bath I will place them with the top facing towards the wall as if it were to overheat then the steam would be facing towards the window instead of flesh.

  2. An investigation in to the effect of temperature on the release of pigment from ...

    This is because the red sap (pigment) will not be held together as well inside the cytoplasm as it otherwise will be if higher temperatures are not applied and the proteins are not affected. I have considered the structural components of the membranes that may be affected due to the increase of temperature; there is an external factor to consider.

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