Enzyme
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Enzyme: An organic macromolecule produced by living cells that acts as a catalyst for a biochemical reaction. Most enzymes are composed of protein but some RNA molecules are catabolically active as well. Enzymes change the rate of chemical reactions without needing an external energy source and without being changed themselves. One enzyme may be capable of catalyzing a reaction numerous times. Different enzymes act on certain substances and produce specific reactions. Examples of enzymes are digestive, glycolitic, activating, and inhibitory.
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This page created 14 Oct 2011 00:52
Last updated 14 Oct 2011 00:53
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