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

There are a whole range of enzymes that catalyse the breakdown of hydrogen peroxide, occurring in both microbial, plant and animal cells. According to the International Union of Biochemistry these are in group 1.11 of "peroxidase" enzymes

Extracts from this document...

Introduction

Notes on Biology experiment There are a whole range of enzymes that catalyse the breakdown of hydrogen peroxide, occurring in both microbial, plant and animal cells. According to the International Union of Biochemistry these are in group 1.11 of "peroxidase" enzymes as "acting on peroxide as acceptor". The most well-known enzyme that breaks down hydrogen peroxide is called catalase or the full name is hydrogen-peroxide: hydrogen peroxide oxidoreductase (EC number 1.11.1.6). Catalase breaks hydrogen peroxide down into oxygen and water. The reaction is 2 H2O2 (+enzyme) = O2+ 2 H2O(+enzyme) Some other information about catalase and peroxidases: * Catalase is a relatively famous enzyme in that it it is an enzyme described as "virtual catalytic perfection" having the highest turnover and catalytic efficiency numbers numbers measured, catalysing over 10 million reactions per second. * In higher organisms catalase is located in organelles called peroxisomes, usually in the liver and kidneys in mammals. Here catalase plays an important role in how the body detoxifies various toxic molecules in the bloodstream, ethanol being one of the important toxic molecules! ...read more.

Middle

2) The power supplied by the gas. 3) The gas supplied to the Bunsen burner. 4) The insulation. Prediction & Science: I predict that the larger the amount of the water, the slower the kettle will take to heat. Basically, more mass of water causes the temperature of the water to increase less quickly. You see, the more mass of water you have, the more particles there are to heat. If you have more particles to heat, the kettle needs more energy supplied to it to heat the water. Some materials need larger amounts of energy than others to produce an increase in temperature. They are much better at storing thermal energy and so have much more to get rid of when they cool down. Notice that water has a particularly high specific heat capacity. This makes it a useful substance for storing and for carrying energy. Such materials are said to have large specific heat capacities. The specific heat capacity of a material is the energy needed to raise the temperature of 1kg of it by 1 degree centigrade. ...read more.

Conclusion

Method: Firstly, I set up the apparatus above. I filled my beaker with water and put a lid on it. Then I lit the Bunsen burner and placed it under the beaker. At that point I started the stopwatch and took the temperature. At the end of the experiment, I measured the temperature again. I will make my measurements as accurate as possible by repeating them and finding an average. I will also use the same apparatus in each experiment and make sure I have measured the amounts of water correctly. Finally I will make sure the Bunsen burner is always on a blue flame and the thermometer is at room temperature before every experiment. I will make my experiments safe by following the Laboratory safety rules carefully. After all, they're there for a reason! I will be careful when handling the apparatus before and after the experiments and be cautious that the apparatus may be hot. I will tuck in my tie so it will not get burnt by the Bunsen burner and I will take care not to burn myself or anybody else with the hot water after the experiments. ...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. Notes on Biology experiment - There are a whole range of enzymes that catalyse ...

    The actual organic mechanism of how an enzyme works is probably beyond your course, but if you would like further reading, I would suggest the textbook "Biochemistry" by Voet and Voet or any other good biochemistry textbook, which you could obtain from your local library.

  2. The effects of organic effluent from the seweage on the biodiversty in a freshwater ...

    Hence I reject the null hypothesis and accept that there is a significant difference between the biodiversty of the two sites due to different levels of organic effluent. Degrees of freedom Significance levels p = 0.05 p = 0.01 15 16 17 18 19 20 21 22 23 24 25 30 40 60 ?

  1. catalase and hydrgen peroxide

    As this experiment was only the preliminary experiment, this doesn't matter too much. But for the real experiment I must carry out all the procedures fairly and accurately. Graph of Preliminary Experiment My graph shows that the rate of reaction slowly increases, and then it drops and decreases.

  2. I am investigating how changing the concentration of Hydrogen Peroxide affects the rate of ...

    25cm3 ensures that I will have enough time to record a trend on how long it took, and that all the results will not be bunched together. I have decided to use 1g of liver because it increases the amount of Catalase available to convert Hydrogen Peroxide into water and

  1. Photosynthesis - revision notes

    On warm, bright days carbon dioxide is the limiting factor and on cool, dull days temperature or light may be limiting factors. Light: We can find the affect of light intesnsity on the rate a plant photosynthesises by using a plant that produces bubbles in light (e.g.: elodea).

  2. Investigating how the amount of Hydrogen Peroxide will affect the speed in which the ...

    This is proved here when it says: "The amount of Catalase speeds or slows up a reaction, if there is more Catalase on the repeats than the reaction will happen quicker, if there is the same amount of Catalase on the repeats than the reaction will happen at the same

  1. Temperature regulation in mammals & birds.

    This is because the graph produced was linear, proving that: 'Surface area / volume ratio' 'average rate of heat loss' The graph is almost certainly a straight line, because there is no indication that it may be a curve of any form.

  2. What affect does the concentration of hydrogen peroxide have on the amount of oxygen ...

    The size of the potato chip, amount of H O and the length of time used to count bubbles in will be accurately measured to ensure the experiment is a fair test. Prediction and Reasoning If testing the H O in the range 0-20%, I predict that the optimum concentration of the H O for catalase will be at 20%.

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