Enzymes are biological catalysts that lower the activation energy of reactions, making them proceed at a faster rate. Here's why:
* Activation Energy: This is the minimum amount of energy required for a reaction to occur.
* Enzymes: Enzymes provide an alternative reaction pathway with a lower activation energy. They do this by:
* Bringing reactants closer together: Enzymes bind to specific substrates (reactants), bringing them into close proximity and proper orientation for the reaction to occur.
* Stabilizing the transition state: The transition state is a high-energy, unstable intermediate state that molecules must pass through during a reaction. Enzymes can stabilize the transition state, making it easier for the reaction to proceed.
Think of it like this: Imagine you want to push a heavy boulder over a hill. The hill represents the activation energy. An enzyme would be like finding a ramp or a path that makes it easier to push the boulder over the hill. The ramp or path lowers the activation energy, allowing the boulder to be moved with less effort.
Therefore, enzymes decrease the activation energy of reactions, speeding them up.
