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Decomposition of H2O2

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Decomposition of H2O2 Catalase disproportionates: 2H2O2 to 2H2O + O2, H2O2 is a powerful oxidizing agent and is potentially damaging to cells. By preventing excessive H2O2 build up Catalase allows important cellular processes which produce H2O2 as a byproduct to take place safely. Question:I know that, in the reaction of the enzyme catalase with hydrogen peroxide, the rate of reaction should double with every 10 degrees Celsius increase in temperature. ...read more.


The above has also been shown to be true of reaction catalysed by enzymes when other conditions, such as concentration of enzyme and substrate, are constant but it is important to remember that this will only be true between approximately 4 degrees and 50 degrees Celsius. Around the higher temperature enzyme denaturation will decrease the reaction rate significantly. BACKGROUND INFORMATION Enzymes such as Catalase are protein molecules which are found in living cells. ...read more.


Hydrogen Peroxide is the poisonous by-product of metabolism. Catalase speeds up the decomposition of Hydrogen Peroxide into water and oxygen as shown in the equations below. Formula: Catalase Hydrogen Peroxide---------------------->Water + Oxygen Catalase 2H2O2------------------->2H2O+O2 It is able to speed up the decomposition of Hydrogen Peroxide because the shape of it's active site matches the shape of the Hydrogen Peroxide molecule. This type of reaction where a molecule is broken down into smaller pieces is called an anabolic reaction. Catalase - the Enzyme Catalase is an enzyme involved in the breakdown of hydrogen peroxide (H2O2) in cells ...read more.

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