Biology

• Catalyst


  Something that increases the speed of a reaction without being used up in the reaction
• Enzymes


  Biological catalysts that speed up the rate of reaction without being used up in the reaction
• Enzymes


  • Made up of long protein molecules
  • The shape of the active site is complementary to the substrate
• Enzyme catalysis


  1. Substrate fits into the active site

  2. Substrate and enzyme bind together

  3. Reaction takes place

  4. Products are released from the enzyme

  5. Enzyme can be used again
• Enzyme catalysis


  • Lock & Key Mechanism
• Enzymes are biological catalysts
• Enzymes speed up the rate of reaction without being used up in the reaction
• Explain how plant cells differ from animal cells, including differences in their cell walls and vacuoles.