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: [[Digestive Enzyme|Digestive '''enzymes''']] are used to break down large insoluble food [[molecule]]s into small [[soluble]] [[molecule]]s.
: The [[chemical]]s that an [[enzyme]] affects are called [[Substrate (Biology)|substrates]].
: [[Enzyme]]s have an area called an [[Active Site|active site]] which is where the [[enzyme]] interacts with the [[Substrate (Biology)|substrate]].
: The [[Active Site|active site]] is shaped to fit with only one [[Substrate (Biology)|substrate]] so [[enzyme]]s all have specific roles in an [[organism]].
===Denaturation===
: [[Enzyme]]s can be [[denature]]d if the [[temperature]]s are too high or the [[pH]] is too extreme. Different [[enzyme]]s have a different [[Optimum|optimum]] [[temperature]] and [[Optimum|optimum]] [[pH]].
: When an [[enzyme]] is [[denature]]d it changes shape so that the [[Substrate (Biology)|substrate]] will no longer fit the [[Active Site|active site]].
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