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

An Experiment To Show The Effect OF Temperature On The passage Of Red Pigment From a Piece Of Beetroot

Extracts from this document...

Introduction

An Experiment To Show The Effect OF Temperature On The passage Of Red Pigment From a Piece Of Beetroot Apparatus & Materials 1 Cork borer Tripod Beaker Gauze Bunsen Beaker (200-300ml) Thermometer Colorimeter Beetroot Boiling tubes Measuring Cylinder Scalpel Method 1. Using a cork borer cut out 6 cylinders of beetroot. 2. Cut each cylinder to 5cm length. 3. Wash each cylinder for 1 minute. 4. Label 6 boiling tubes A,B,C,D,E,F respectively. 5. Pour 25ml of de-ionised water into boiling tube (A) ...read more.

Middle

The pigment is held in the cell by the cell wall and the cell membrane, which coats the inside. The cell wall is fully permeable and does not effect the passage of the pigment but the cell membrane holds the pigment inside. The cell membrane is a lipoprotein bi-layer and facilitates the transportation of particles in and out of the cell the pigment passes through channels in the membrane but this diffusion is limited by the size of the channels in the membrane. ...read more.

Conclusion

Evaluation The results were very accurate but there were a couple of variables which could have been controlled better. For example the temperatures of the tubes could have been controlled better because there was a slight variation of 2-3 degrees which may have affected the results and if an electric heater connected to a thermister was used then the temperatures could have been kept exactly constant. Also the surface area of the cylinders varied and would affect the speed of diffusion because the larger the surface area the faster diffusion takes place thus affecting results. ...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

See related essaysSee related essays

Related AS and A Level Molecules & Cells essays

  1. Marked by a teacher

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

    4 star(s)

    'Mosaic' is used because the protein molecules that are scattered across the membrane give the appearance of a mosaic from above. The phospholipid molecules are made up from a hydrophilic head (phosphate group) and a hydrophobic tail (fatty acid). These are shown in detail in Fig.

  2. Marked by a teacher

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

    3 star(s)

    When a carbon has all four single bonds, it is said to be saturated as it has the maximum number of single bonds that it can make. This allows the phospholipids and other components of the bilayer to fit together as closely as possible (without being too rigid)

  1. Marked by a teacher

    effect of temperature on beetroot pigment through membrane

    3 star(s)

    To make a buffer: - Dissolve one packet of buffer substance in 250 cm3 of distilled water. - A 250 cm3 buffer solution at pH 7 will be made. It would be better to use isotonic salt or sugar solution, however using readily available distilled water is an acceptable alternative.

  2. TEMPERATURE ON BEETROOT PERMEABILITY

    Everyone should shake their test tubes with the beetroot before pouring the solution made into the cuvettes. If beetroots weren't shaken before putting the solution in the cuvette, then some leaked betalain pigment won't be present for use in calculating the % light transmission.

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