• 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)

    This backwards "S" shape means that at a certain temperature (between 50 and 60) there is a sharp increase in the speed at which the proteins denature. This is because between the temperatures of 30 and 40 ?C the diffusion increases as the beetroot reaches it's optimum diffusion levels.

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

    Each will be given a absorbance value (unit) which will then be put into the results table. Precautions I will repeat the experiment three times to make sure that the data can be seen as reliable. This should mean that any errors can be detected resulting in more reliable data.

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

    Nadia Mohamad Rom Method (in greater detail) I am going to use 7 different temperature ranges. I have chosen to us 20 C, 30 C, 40 C, 50 C, 60 C, 70 C and 80 C. I have decided to use these temperature ranges to give me valid and reliable enough results to analyse and draw conclusions from, using the time available and equipment available.

  2. The factors affecting the rate of permeability in a cell membrane?

    much water is present in the cytoplasm and in the exterior environment. * The concentration of solutes, such as ions and sugars, on either side of the cell surface membrane. * In plants, the pressure exerted on cell contents by the cell wall Water potential is the tendency for the

  1. The effect of temperature on the movement of pigment through cells.

    To ensure m results where in the right region I compared my results with those of my classmates, this enabled me to compare each result and check how similar it was to the average of the class results. This proved that my results were quite similar to my classmates and showed the reliability of my results.

  2. 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

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

    As the input of kinetic energy increases, the particles move even faster, so the particles of the red pigment will move faster out of the cells. I predict that as the increase of temperature is applied, there will also be an increase in the release of red pigment out of the beetroot cells.

  2. Investigating the Effect of Temperature on the Permeability of Membranes.

    Beetroot will be used, other then another cell sample as the red pigment contained in the cells can be observed moving form the cells if the membrane is altered. 2.Cork Borer, to cut sections of the beetroot out, this will be used to ensure the cylinders of beetroot are of

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