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Enzymes
Chemical Rxn’s & Enzymes
_________________________:
 Change from one set of chemicals to another set of chemicals
 Involves the breaking of bonds & the formation of new bonds
_________________________________: (AE)
 Energy needed to get a reaction started
What is an ENZYME?
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An enzyme is a special type of protein called a catalyst
______________________: substance that speeds up a rxn b/c it
Cells use enzymes to speed up reactions
Very specific: usually only catalyzes one item called the
_____________________________
How Does an Enzyme Work?
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Enzyme comes in contact with substrate at certain spot called
__________________________
Fits together like a “llock & key”
Bonding at active site weakens the bonds
in the substrate
Makes it easier to change substrate
What are enzymes used for?
What regulates them?
Used for:
 _________________________,
DNA reproduction & _____________________
Regulated by:
 Changes in ________________
 Temperature
 Other proteins, and chemicals
Summary: