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Post by ABIGAIL CASSIDY PIERCE on Oct 23, 2010 20:03:30 GMT -5
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Post by EVAN REESE TIGRE on Oct 24, 2010 16:10:43 GMT -5
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Post by LEVI OLIVER KEYES on Oct 24, 2010 22:36:48 GMT -5
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Post by JORDAN ANDREW DREDD on Oct 27, 2010 22:05:01 GMT -5
There are copious amounts of enzymes that are involved in many chemical reactions in living cells. Acting as catalysts they can speed up or start these chemical reactions by lowering the activation energy that is needed to start different chemical reactions. These enzymes in living cells are formed by protein synthesis, packaged by the golgi apparatus so that it can be later used throughout the cells. In potatoes and other living cells, one example of an enzyme is peroxidase(breaks down hydrogen peroxide) which is found in the peroxisomes of the cells. Even though enzymes act as catalyst, meaning they are not absorbed in the chemical reaction they can be affected. All enzymes can be affected negatively, such as being denatured, by pH, temperature, surface area and certain levels of cofactors. In a potatoes living cell, even when cut up, performs metabolic reactions which create a byproduct of hydrogen peroxide which can damage the cell if the peroxidise is unable to break down the hydrogen peroxide into water and oxygen.
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