Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy. ... The binding of a substrate to an enzyme active site is termed the "enzyme-substrate complex.
145° to make 180° and 45° to make 90°
Just took the test and figured out the answer was A. Hoped I helped you and everyone else reading this.
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