Biology Enzyme lesson

1. Enzymes

9. Lock and Key Analogy

10. Induced Fit Theory Active site : Is the place on the enzyme where the substrates fit. Induced Fit Theory : updated Lock and key concept. States that when reactants are brought together, they reach a transition state which allows the reaction to proceed. Not as rigid.

11. Degradation and Synthesis Degradation = large molecule broken down into a smaller ones Synthesis = combination of several smaller molecules into a a large one

13. What Effects Enzyme Activity? pH: Every enzyme has a small optimal pH range. Higher or lower pH disrupts chemical bonds changing the shape of the enzyme. Temperature: Environments hotter than the enzyme’s optimal temperature cause the enzyme to denature (break down). Cold Temperature slows down enzyme activity By decreasing molecular motion.