• 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...


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.


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.


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?

    This would be due to the osmosis occurring - the water molecules moving from the low concentration of sucrose or distilled water to the stronger solution in the potato, through the semi-permeable membrane - the cell wall. Evaluation Overall, the investigation went really well.

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

    Osmosis will occur as always flowing down the water potential gradient so the water will diffuse from the high concentrations in the chips to the low concentrations outside of the chips in the solute solutions, the solute will again not diffuse out or in the chips because as explained before,

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

    0.14 56 C 0.22 0.27 0.34 0.27 60 C 0.24 0.34 0.51 0.36 72 C 1.18 1.28 1.68 1.38 78 C 1.50 1.70 1.72 1.64 N.B. The colorimeter readings have all been rounded up to decimal places including the mean averages.

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

    I predict that this solution will cause the potato to loose the most amount of mass or the most water loss. I predict this is because now with this high concentration, the concentration of solute molecules is now very high outside the cylinder.

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

    them out of the test tube, and clean them gently with paper towels. I am going to record the length of the potato chips after 24 hours. I am going to record the data obtained on a table after 24 hours.

  2. Photosynthesis - revision notes

    No simple experiment. Taking away water kills plant. What does photosynthesis produce?? (Apart from starch what else is produced in the process of photosynthesis??) Is oxygen produced during photosynthesis?? Joseph Priestly's experiment (in 1771). Joseph Priestly did an experiment to answer the question above. The experiment: (1) A lit candle is placed in a sealed chamber.

  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. 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