* Enzymes are catalysts: They speed up reactions without being consumed in the process.
* Active sites: Enzymes have specific active sites where reactants (substrates) bind and undergo a chemical transformation.
* Limited active sites: The number of active sites available on enzyme molecules is finite.
* Saturation: As substrate concentration increases, the rate of reaction increases until all active sites are occupied. At this point, the enzyme is saturated, and adding more substrate won't increase the reaction rate further.
The relationship:
* Low enzyme concentration: With a low enzyme concentration, there are fewer active sites available, so the reaction rate will be slower.
* High enzyme concentration: With a higher enzyme concentration, there are more active sites available, so the reaction rate will be faster (until the enzyme is saturated).
Key takeaways:
* Increased enzyme concentration = Increased reaction rate (until saturation)
* Decreased enzyme concentration = Decreased reaction rate
Think of it like this: Imagine a busy restaurant with only a few cooks. If you add more cooks (enzymes), the restaurant can serve more people (reactants) faster. However, even with more cooks, there's a limit to how fast they can work. Once the cooks are all occupied, adding more customers won't make the restaurant run any faster.
