Activation energy is the minimumamount of energyrequired to bring about a reaction.
what is an enzyme?
An enzyme is a protein that acts as a catalyst, increasing the rate of a biochemical reaction.
It does this by lowering the activation energy.
what do enzymes catalyse?
Both intracellular and extracellular reactions
what are intracellularreactions?
take place inside of the cell
what are extracellular reactions?
take place outside of the cell
what is an active site?
An active site is the region on an enzyme where a substrate fits to catalyse a reaction.
The shape of the active site is determined by the enzyme’s tertiary structure.
describe the induced fit model of enzyme action
The substrate starts to bind to the active site.
Then, the shape of the active site changes so that the active site and substrate are complementaryThis puts stress on the bonds in the substrate and makes them easier to break. This lowers the activation energy.
