ENZYMES

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ENZYMES

• EQ How do enzymes function as catalysts?

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What is an ENZYME?

• An enzyme is a special type of protein called a
  catalyst
• Catalyst substance that speeds up a reaction
  because it lowers the activation energy
• Activation energy energy needed to get a
  reaction started
• cells use enzymes to speed up reactions

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• Enzymes are very specific and usually only
  catalyze (speed up) one item called the SUBSTRATE
• A Chemical Reaction is the change from one set of
  chemicals to another set of chemicals.
• It involves the breaking of
• bonds and the formation of new
• bonds.

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HOW DO ENZYMES WORK?
Enzyme Substrate BOND
Bonding weakens substrate to allow better fit
Enzyme Products leave active site
Enzyme Substrate come together at Active Site
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What are enzymes used for?

• Digestion
• photosynthesis
• DNA reproduction

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What regulates enzymes?

• changes in pH
• temperature
• other proteins chemicals