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

How do different concentrations of sucrose solution effect potato tissue?

Extracts from this document...

Introduction

Background Information Osmosis is the movement of water molecules though a partially permeable membrane from an area of high water potential to an area of low water potential. The membrane lets small water molecules pass though but not large ones. The flow continues until the concentration becomes the same on the inside as on the outside. This is called equilibrium. Molarity is a measure of contestation. Aim How do different concentrations of sucrose solution effect potato tissue? Prediction Based on my background information, I predict that the potato will change in mass and in length. I believe this because each Molarity of sucrose will change the potato's water content. This will happen because either the concentration will higher in the sucrose and lower in the tubers or lower in the sucrose and higher in the tubers. ...read more.

Middle

cut 30 pieces of potato to 1 cm length using a ruler and knife, and weigh each ones starting mass * I will put 25 cm3 of the 5 different sucrose solutions into 30 test tubes and add all the 1 cm potato cuttings into the solutions * I will then add these into the rack * I will leave for 15 minutes * Now I will measure the ending length and mass * I will add this information into the table created at the start and compare the results Preliminary Results After we did the Preliminary test we decided to use 1 cm long 4 mm diameter tubers. We would put them in 25 cm3 sucrose solutions. ...read more.

Conclusion

Conclusion My results show that as you increase the sucrose solution consecration the weight of the potatoes tuber goes up. This is because the water potential inside the tissue is lower than the sucrose solution; this means water passes though the partial permeable membrane into the cell. The result showing the length of the tuber did not show a distinct pattern this may be because we could only measure to one decimal place. You can be more accurate with a top pan balance because it goes to two decimal places and it is digital not analogue like a ruler. Results Graphs Dave Richens Osmosis Investigation Coursework Page 1 of 4 ...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 Exchange, Transport & Reproduction section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Here's what a teacher thought of this essay

3 star(s)

An average write up, although the results are not very accurate due to the potato not being left for long enough. A results table has been left out with is unhelpful when trying to anaylse results. 3 stars.

Marked by teacher Louise Star 10/04/2013

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 Exchange, Transport & Reproduction essays

  1. Marked by a teacher

    Investigate the water potential of celeriac.

    5 star(s)

    This shows that celeriac must have a less negative water potential than the carrot and potato. I think this because it has much less solutes dissolved in its cells. After the reducing sugars test, I placed the test tubes into a colorimeter.

  2. Marked by a teacher

    Sand Dune Succession Coursework

    5 star(s)

    Marram grass, when covered by sand, has stems which can elongate allowing the grass to re-emerge. The long roots that spread deep into the ground help search for water. Preliminary work: I carried out a preliminary investigation at Winterton sand dunes.

  1. Marked by a teacher

    Biology coursework planning - the effect of lead chloride on the growth of cress ...

    5 star(s)

    Lead removes sulphur atoms from the disulphide bonding. This means that the shape of the protein and therefore, the enzyme is altered. The normal activity of the protein stops and the enzyme is said to be denatured (Biology 1, OCR, pg 47).

  2. Marked by a teacher

    An investigation on the effect of temperature on beetroot membrane structure.

    4 star(s)

    Therefore, the more dye that has passed into the solution, the more denatured the proteins have become and the more damaged the membrane will be. This may mean that my data is reliable but there may occur some random errors in the data.

  1. Marked by a teacher

    The Effect Of Temperature On The Permeability Of The Cell Membrane

    3 star(s)

    be used to check the temperature of the water bath, I will be using an analogue thermometer as it is reliable, I will be using this to measure the temperature of the water bath before I start my experiment to make sure it is correct and accurate] * Scalpel- [What?

  2. The Effect of Different Substrates on the Rate of Respiration on Yeast (Saccharomyces cerevisiae).

    Anaerobic respiration releases much less energy than aerobic respiration, only 210KJ compared to 2880KJ. In anaerobic conditions most energy remains locked in the ethanol. One problem is that alcohol is poisonous in large amounts. If the concentration of alcohol gets more than 14% it kills the yeast and the fermentation stops.

  1. Osmosis in Living Tissue.

    -3.3 10.0 3.3 -1.7 -6.7 -5.6 -10.0 10.1 3.3 -0.9 -10.0 -6.6 -13.3 4.8 3.2 -3.3 0.0 -9.8

  2. Experiment to find the effect of different concentrations of sucrose solution on osmosis using ...

    At every 10 minute intervals the visking tubes were taken out of the test tubes, placed on paper towels and dried, again squeezing out any solution in knots. These were weighed and noted in the table and then placed back into the test tubes. This was repeated for 40 minutes.

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