Enzymes and Cellular Respiration

• Activation energy:

  • energy needed to start chemical reaction
  • enzymes lower activation energy
• Lock and key model steps:

  1. seperate substrate and enzyme
  2. enzyme/substrate complex
  3. enzyme/product complex
  4. product leaves active site
• Substrate:

  • molecules which enzymes act on
• Active site:

  • where substrate attaches to form enzyme-substrate complex
• substrate can either weaken or form chemical bonds, resulting in substrate breaking down or joining two substrates together