Upload
katrina-adams
View
217
Download
3
Embed Size (px)
Citation preview
Enzyme Action
Lets speed things up
Catalysts
• Catalyst is a chemical that speeds up a reaction
• The catalyst never changes• Never gets used up• It lowers the activation energy needed for a
reaction to take place• Enzymes are organic catalysts
Enzymes
• Enzymes are organic catalysts• Enzymes are made of proteins• Proteins have a specific 3D shape• This shape determines which reaction it
speeds up. Only certain molecules will fit.• Special shape is called an active zone• The stuff that fits in there is called the
substrate.
Here’s how it works
• Enzyme action• Remember enzymes can break two molecules
apart or put two molecules together.• They don’t change they just speed things up.• Every reaction in your body requires a
different enzyme.
Activation energy
Peroxidase
• Peroxidase is an enzyme in liver and plant cells
• It breaks peroxide into water and oxygen
• 2 2H2O + O2
• Peroxide is the substrate• Its made by cells as a waste product• It’s toxic (it kills germs, dyes hair)