Enzymes

Question 1

Induced fit

Answer 1

• the enzyme’s active site changes shape slightly as the substrate enters
• the initial reaction between the enzyme and substrate are relatively weak
• these reactions rapidly induce changes in the enzymes tertiary structure, strengthening the binding
• this puts a strain on the substrate which can weaken a particular bond or bonds within the substrate
• this lowers the activation energy

Question 2

Lock & key

Answer 2

• active site has a shape that is complimentary to the substrate
• substrate enters the enzyme and forms an enzyme-substrate complex
• the substrate reacts which forms an enzyme-product complex
• the R group in the active site reacts with the substrate
• forms temporary bonds
• puts strain on bonds that are within the substrate
• helps the reaction along