- Activation energy
- Catalysts is compounds that speed up chemical reactions.
- The main catalysts of chemical reactions in organisms are specialized proteins called enzymes.
- Enzymes provide a way for reactions to occur at the cell's normal temperature, it doesn't suppy activation energy to the reacting molecules but lowers the energy requirement barrier.
- A specific reactant acted upon by an enzyme is called the enzyme's substrate, it fits into a particular region of the enzyme called the active site.
- Enzyme lowers activation energy by accepting two reactant molecules into adjacent sites.
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