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

    the water bath, and I had to find an alternative method to make sure that the temperature at which the reaction was happening was the one I specified. Recording my results at a more accurate degree (such as 4 significant figures)

  2. Investigating the effects of Copper Sulphate on the action of Catalase Enzyme breaking down ...

    Also safer Syringe To draw up the liquids It is easier and more accurate to use then a pipette. Also more precise 0.1ml syringe= 0.05ml Ruler To accurately cut potatoes into cubes Easiest to use and measure sizes in 0.5mm Potato chipper To cut potato into pieces of equal widths

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

    A Retort Stand and Clamp helps to hold the burette perpendicular to the work bench, so that readings can be accurately read. The pilot experiment showed that a small amount of Vaseline, or any suitable waxy lubricant, is required. Gas can escape from joints and seals, by applying Vaseline the

  2. Reaction of Catalase and Hydrogen Peroxide

    Thus the rate of the reaction will increase. The heat of the molecule inside the system will increase. As the temperature of the system is increased the internal energy of the molecules in the system will increase. The internal energy of the molecules may include the translocation energy, vibration energy

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

    If however the shape is changed then the substrate will not react, which means that the enzyme molecule has denatured and changed shape, which shows that the lock will not fit into the key. Diagram of the lock and key theory. 4.Describe in detail, how the experiment will be carried.

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

    fit into the active site of the enzymes, blocking the active site so that substrate can't enter, also slowing down the reaction. Non-competitive inhibitors: - Non-competitive inhibitors don't have the same shape as substrate and therefore don't compete with active site.

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

    inhibitor of the enzyme called catalase which is mainly found in the liver. Prediction I predict that as the concentration of copper(II)sulphate increases, inhibition on the enzymes will be greater, thus the slower the rate of the enzyme-controlled reaction. I think that at the end of the experiment the rate

  2. Hydrogen Peroxide and catalyse.

    This was between 0 and 6 moles per litre for the concentrations between 0% and 20%. Therefore V=1012*5 5E-8+5 V=1E12 reactions per second per molecule of enzyme. I estimate that there are about 50000 molecules of enzyme per square centimetre.

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