Enzymes

• enzymes are made of protein
• most enzymes end in 


  -ase
• examples of enzymes


  amylase, maltase, protease
• all enzymes are 


  biological catalysts
• biological catalysts


  speed up chemical reactions in the body by decreasing the amount of energy the reactions need to happen (activation energy)
• enzymes have an active site


  part where the substrate fits in
• substrate


  molecule to be worked on
• the enzyme is 


  not used up, free to be used again