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

The effect of sugar concentration on potato tissue - Osmosis

Extracts from this document...

Introduction

The effect of sugar concentration on potato tissue Scientific Background Knowledge Osmosis Osmosis is very important in plant cells. !!!!!!!!!!!!!!!!!!!!!!!!!!! Osmosis is the passive movement of water molecules from an area of high concentration to an area of low concentration through a partially permeable membrane. In a plant cell, it is the cell membrane which acts as the partially permeable membrane. This is due to the small holes within it, which allow small molecules to pass through, but not large ones. The cell membrane separates the contents of the cell from the outside. During osmosis, water diffuses from the weaker solution (high water concentration) into the stronger solution (low water concentration.) ...read more.

Middle

If a plant cell is turgid it provides support for the plant, and is useful in the opening of stomatal guard cells during the process of transpiration. Flaccid Cells If a plant does not get enough water either because the plant is losing more water through transpiration than it is taking in through osmosis, or because the plant is losing water through osmosis, then the plant will begin to wilt. This stage is when the plant becomes FLACCID. If a plant cell is placed in a strong solution (low water concentration) then the water molecules will move from the cell vacuole which has a higher water concentration into the surrounding solution. ...read more.

Conclusion

Usually it results in the death of the cell. Potato Tissue Potatoes are made up of a bulky tissue structure. Similar to other plants, potato plants make glucose by the process of photosynthesis. This glucose is stored as starch in the stems and leaves, so it can be used when photosynthesis is not occurring. Glucose is stored as starch, as it does not bloat the storage cells as glucose would do due to osmosis. In particular the potato plant stores a large quantity of starch in its roots during the winter so that the plant can grow from the stored starch the following year. Humans eat this swollen root, and it is the root that we shall be using in our experiment. Sources I used: * The Revision Guide * Biology for You The Usbourne Illustrated Dictionary of Science Laura Smith 17/02/2005 ...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. What effect does the sucrose concentration have on osmosis?

    After studying both graphs and all the tables I have come to the conclusion that there were no anomalous results. This is because all of the values in the tables are in close proximity of each other and all of the plotted points in the graphs are also consistently near each other showing that my results were accurate throughout.

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

    I felt that this was much easier and a more accurate way to cut the 1/2 pieces like I had done. I had cut all of my 1/2 pieces using this way and hat managed to cut all the pieces to the correct sizes the 'first -time round'.

  1. Determine the water potential of potato tuber cell with the varying affect of solute ...

    Note the time that you put each cylinder in the tube. (4) After roughly 24 hours for each cylinder, remove the appropriate cylinder from the tube in the same order you put them in. Using the forceps, place the cylinder on the paper and roll the cylinder around to remove

  2. osmosis. I will be investigating the effects of different concentration of sugar solution will ...

    I will also, after this step, measure the weight of the potato chips, in their corresponding order. Then I will again, collect this data on to the table I have planned. I will repeat this 2 more times. Safety precautions and fair test I am going to try to make my experiment fair as possible through many measures.

  1. Photosynthesis - revision notes

    (4) After about 10 days the candle burns again. Conclusions from experiment: This experiment shows that oxygen is produced from photosynthesis. The candle, when put into the sealed chamber, quickly used up the oxygen. When the mint was added it obviously produced oxygen so that the candle could burn again.

  2. Investigation into the affect of Osmosis in Potato Tissue.

    Water will flow into the cell if the solution is pure water or a hypotonic solution and will flow out if the solution is hypertonic. (A) Plasmolysis occurs when a plant cells membrane shrinks away from its cell wall. This phenomenon occurs when water is drawn out of the cell and into the extra cellular (outside cell)

  1. Investigate the cell sap concentration of solute in a potato chip using osmosis and ...

    They can even take in more salts against a concentration gradient by using protein carrier cells found in the cell membrane. The protein carrier cells open up, get some more salts close and then open up again putting the salts into the cell, osmosis can never work like this because

  2. An investigation into the effect of differing water potentials on the mass or volume ...

    Generally if plant cells are put into a substance with a higher water potential there will be a net movement of water molecules into the cell. This will cause the pressure to build within the cell and causes them to swell and so become turgid.

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