Thursday, October 29, 2015


Another video by AP Biology teacher Paul Anderson, this on the organic catalysts made of protein called ENZYMES.   Enzymes are stereospecific: they have a unique three-dimensional shape, and the active site of the enzyme is said to fit substrate molecules like a "lock" fits a "key".   When the substrate enters the active site, it places the molecules in just the right orientation that a chemical reaction becomes likely to occur.  

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