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

CATALASE AND HYDROGENPEROXIDE

Extracts from this document...

Introduction

CATALASE AND HYDROGENPEROXIDE Enzymes are biological catalysts which means it is produced organically made by the cells it's a molecules made up of protein which are synthesized by the cell to perform very specific functions. Enzymes are an important part of life due to the fact that they regulate chemical reactions within the body. Enzymes control the rate and direction of the reaction they also speed up chemical reactions allowing them to occur more easily this occurs in four different ways, one way is heat, another is increasing the rate of reactants, the third way is decreasing the amount of products and the fourth way is enzymes, which speed up reaction without themselves being used up. Without them we would not be alive because they are involved in digestion, respiration, reproduction, vision, movement, thought, and also in the productions of other enzymes. Simple cells may have as many as 2000 enzymes with each one catalyzing a different reaction. An enzyme can speed up a reaction making it 10, 000,000,000 times faster. All enzymes are made of protein; that is why they are sensitive to heat, pH and heavy metal ions. . Copper ions are poisonous: if you get copper ions in your blood they will block up some of the important enzymes in red and white blood cells. ...read more.

Middle

He put forward the Induced Fit Theory. This states that instead of an enzyme having a compliment shape of active site, the active site is able to grab the molecule and fit around it: As the enzyme takes in the substrate, the chemical bonds can weaken in the substrate, helping the reaction to go on. Like the lock and key model, each enzyme catalyzes a reaction only with certain substrates. It is said that both types of reaction occur in the body. Catalase is an enzyme which makes another hydrogen peroxide undergoes a chemical change without the enzyme chemically changing. Therefore a catalase can be used many times. Without catalysts chemical reactions would take much longer that the average human life expectancy. So that would mean that in 76 years only a couple chemical reactions would take place. Since our bodies have enzymes hundreds of chemical reactions occur in a day. If our bodies didn't have catalysts our body cells couldn't function. All reactions take energy to get them started. This energy is called the activation energy. Enzymes catalyse reactions inside organisms, because they speed up the rate of reaction it is said that enzymes lower the activation energy of the reaction, it lowers the amount of effort needed to get the reaction going. ...read more.

Conclusion

The more water and oxygen produced, the less hydrogen peroxide is left to react. The concentration of hydrogen peroxide in the solution then decreases, and the reaction slows down. The reaction slows down, because the concentration of hydrogen peroxide in the solution is lower. Hydrogen Peroxide---------------------->Water + Oxygen 2H2O2 ------------------------> 2H2O + O2. If the temperature is too low the enzyme molecules will not have enough energy to collide with the hydrogen peroxide molecules, so the reaction will not carry on. As the temperature gets hotter, the rate of reaction will then increase as the molecules have more energy. One way to measure the rate of a reaction, is to measure the amount of product being produced. In this case, the products are water and oxygen, but in this case oxygen will be measured and time would be in seconds. The substrate and the catalase are always on the move so there is a big chance that they will collide forming the enzyme substrate complex; this is catalase-hydrogen peroxide complex. When the hydrogen peroxide fits into the catalase's active site, enzyme + product which are enzyme-oxygen & water complex is made this are Enzyme-product complex which is catalase + water & oxygen. ?? ?? ?? ?? Elizabeth Oluwajuwa Adeniran Catalase and Hydrogen Peroxide ...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 Molecules & 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 AS and A Level Molecules & Cells essays

  1. Show that the copper found in copper copper(II)sulphate is indeed a non-competitive inhibitor of ...

    of reaction would generally be reduced by up to 50% if the concentration is reduced by the same percentage. Variables Before the experiment can commence all the variables that could hold a bearing on the results must be discussed, and also to determine which variables would be kept constant during

  2. Hydrogen Peroxide and catalyse.

    Any spillages must be wiped up as soon as possible to avoid accidents and mishaps that could be caused by leaving them. Apparatus: Diagram of apparatus: * * 1/2 litre container � � Boiling tubes � � Five litre ice-cream tub � � Retort stand � � Three clamps � � Buckner flask (with tube and bung)

  1. Investigate how concentration of the enzyme catalase in celery tissue alters the rate of ...

    When the celery extract concentration was 0%, the amount of gas produced over the three minutes remained at 2.6 cm3. By changing the concentration of celery extract, we were changing the concentration of enzyme in the solution.

  2. The effect of Copper Sulphate concentration on Catalase activity on Hydrogen Peroxide.

    my statistical test demonstrated, although the method contained a range of sources of error and could have widely been improved on. Sources of error: I shall now display a list of the equipment used and its accuracy. Not counting human error, there will always be a small percentage error in

  1. To investigate the rate at which hydrogen peroxide is broken down by the enzyme ...

    I would use the same method as I did for the celery, as this would make the test fair.

  2. Investigating the effect of the Temperature on the Enzyme Catalase when it reacts with ...

    It was very important that this part of the enzyme does not change shape. As I know from the experiment that the active centre of the enzyme catalase did change shape, the reason why this part of the enzyme changed shape is because it was at a high temperature, and

  1. Reaction of Catalase and Hydrogen Peroxide

    Thus the greater the kinetic energy of the molecules in a system, the greater is the resulting chemical potential energy when two molecules collide. As the temperature of a system is increased more molecules per unit time will reach the activation energy.

  2. This is an experiment to show how different concentration of celery tissue enzyme, catalase ...

    substrate and catalyse, so that I take them with the help of my small syringe. Stop Clock This is probably the most important gadget I will be using. It will be used to measured the time of my experiment, so that I will be able to take the readings at ten-second intervals for two minutes.

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