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A catalyst is a substance that alters the activation energy of a chemical reaction, thus facilitating its occurrence, but does not get consumed in the process.[1] A protein that acts as a catalyst is called an enzyme. The strength of a catalyst is directly related to its activation energy and the environment under which the reaction occurs.


  1. Wile, Jay L. Exploring Creation With Biology. Apologia Educational Ministries, Inc. 1998.
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