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

Investigating the effect of surface area on the rate of an enzyme controlled reaction.

Extracts from this document...


Investigating the effect of surface area on the rate of an enzyme controlled reaction ENZYME: An organic catalyst formed by living cells, but not depending on their presenckje for their action. Concise Oxford Dictionary Processes within cells sojjjmetimes produce substances that would be harmful to the cell. To combat this, the cells require a method of disposing of this waste and this method involves enzymes. Inside the cell, enzymes and substrates move around. Enzymes have been created by the cells, and substrates are the dangerous by-products of the reactions within the cells. When an enzyme and a substrate collide, they join together K;lo'o'j'o Once they are joined, the enzyme can begin working. It attempts to split the substrate into pieces, which are not harmful to the plant. As this diagram shows, the substrate is split up, but the enzyme is not changed. It can then go on to be used to catalyse other reactions. The experiment that I will be completing involves using hydrogen peroxide as the substrate and catalase as the enzyme. Catalase is found inside potato cells, and can be releao'o'jsed by cutting the potato. ...read more.


The results that I recorded were as follows: Table to show the time taken for 10ml of oxygen collect with different numbers of potato pieces Time take for 10ml of oxygen to collect (mins) No. of potato pieces Experiment 1 Experiment 2 Average 1 6.22 4.34 5.28 2 5.48 4.11 5.01 3 2.51 3.27 3.06 4 2.59 2.47 2.53 5 3.04 4.02 3.33 6 2.24 2.57 2.41 From these results I was able to create this graph However, this does not give a very useful display, as the data is graphed by number of pieces rather that the surface area. To give a more useful visual display of the results, I created the following graph: Although these results are not exactly correlating, there is a trend of negative correlation. This shows that the overall prediction was correct, and the larger surface area, the less time is taken for oxygen to be produced. However, some of the results were anomalous. The table below highlights the results that I consider tuoitoro be anomalous, and the recalculated averages. No. of potato pieces Surface area (cm�) ...read more.


lthough the results were enough to show a trend, they were not very accurate. This could be due to a number of factors, including: * Inaccurate readings - the readings of the time may be inaccurate, as they were dependant on human observation of 10ml of oxygen being collected, anryid a human stopping the stopwatch * Different potatoes - different potatoes were used for experiment 1 and experiment 2. These will have been different in some way (type, age, temperature, time since harvest etc) * Different parts of potato - The pieces used were taken from throughout the potato. I do not know about potato anatomy, but there may be more catalase in the centre, or at the bottom of the potato * Inaccurate equipment - not all of the equipment was accurate, so other variables could have changed. To improve the experiment, further work would have to be done on controlling the variables stated above. However, as some of these are very difficult to control, I would like to repeat the tests more then twice. In an ideal situation, I would repeat the test over ten times to get an accurate result. However, realistically, there would not be time for a large number of repeats to take place. I5i78 ...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 Life Processes & 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 GCSE Life Processes & Cells essays

  1. Marked by a teacher

    Investigating the effects of surface area on the rate of enzyme reactions.

    4 star(s)

    More collisions mean more chance of substrate fitting into an active site. The heat energy also affects the shape of the active site, and at the optimum temperature, the shape is ideal for the substrate to fit into it. If the temperature is much higher than the optimum, it will denature.

  2. Investagating the Action of the Enzyme Catalase On the Surface Area of a Potato.

    As the catalyst is left in the hydrogen peroxide for longer, this gives more time for the amount of oxygen produced to build up. The volume of hydrogen peroxide used in the experiment will also affect the experiment. This is because if there is more hydrogen peroxide solution surrounding the

  1. The effect that Temperature has on the rate of a Reaction, in an Enzyme ...

    Amount of Bubbles Produced Time (Minutes) Amount of Bubbles Produced 1 5 1 0 2 7 2 0 3 8 3 1 4 13 4 2 5 20 5 3 6 23 6 3 7 24 7 3 8 26 8 4 9 29 9 4 10 30 10 6 11 31 11 6 12 33

  2. Experiment to investigate the effect of surface area on the rate of reaction.

    the more frequent the collisions will be between molecules, increasing the rate of reaction. This is known as the collision theory, in which there is an increased chance of a successful reaction occurring, therefore speeding up the reaction. > Enzyme Concentration - Providing there is excess enzyme molecules, the introduction

  1. Investigating an enzyme-catalyzed reaction

    First fill a small water bowl so that it is 3/4 full with normal water- This is done because you need to put the burette which is filled with water (later on in the plan) in the water bowl to make sure that no water is lost before the reaction.

  2. Investigate the effect of surface area on the rate of reaction of the enzyme ...

    A thermometer will monitor the temperature of the water and if there is an increase or decrease in water temperature, I will add more water, which is at room temperature into the fish tank so I can keep the experiment fair.

  1. Investigating the effect of surface area on the rate of an enzyme controlled reaction ...

    The oxygen is collected in the test tube. The reaction is 2H2O2 ?(with catalase) ? O2 + 2H2O SAFTEY PRECAUTIONS Hydrogen Peroxide is a dangerous chemical. During the experiment I will take the following safety precautions: * Wear goggles when using hydrogen peroxide * Wear gloves when using hydrogen peroxide * Keep a clear, organised work area at

  2. An investigation to find out how surface area affects the action of the enzyme ...

    oxygen produced over a certain period of time will also increase, at a rate proportional to that of the increase in surface area. Although this may not be the case, as I increase the surface area, due to an inaccurate method, the volume of the cuboid also increases.

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