• 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?

    may have left more surface area over on one of the potatoes - resulting in faster osmosis.

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

    After 10% solute concentration it is fair to say that the weight of the chip will definitely decrease as the solute concentrations from 10% upwards should be higher than the solute concentrations in the potato chips, evident from the pre-test graph and the predicted graph.

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

    any excess water, however do not squeeze them or they will loose water. Now weigh the potatoes again and as before calculate the mass of the potato for the final mass. When ready, everything should be looking like this as the reaction takes place 1), you time for 25 minutes 2)

  2. Photosynthesis - revision notes

    So, what happens during photosynthesis?? The experiments above all show that plants need: * Carbon dioxide * Water raw materials * Light * Chlorophyll for photosynthesis and produce: * Starch (originally glucose) * Oxygen. products What controls the rate of photosynthesis??

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

    With three readings and getting a mean, it will be more believable to conclude that the results are evened out, and can also possibly prevent from getting anomalous results. Before I can actually start my investigation, I will obviously need to cut all my 21 beetroot pieces at the beginning

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

    After setting up beakers and test tubes, I will place the potato chips inside the test-tubes I am pouring the different concentrations of sugar solution into each of its own test tube. After, I have poured the different concentrations of sugar solution into each of its own test tube, take

  1. 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)

  2. Investigation into Osmosis In Plant Cells

    The presence of the semi-permeable membrane enables the cell to keep all these chemicals inside the cytoplasm. Animal cells are usually quite fragile, and if two much water enters the cell, it will burst, as the tank does above. Plant cells on the other hand have developed an elephant, which

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