They are globular proteins that act as biological catalysts.
- They allow biochemical reactions to happen at the temperature found in an organism.
- They are unaffected by reactions and can be used many times.
- They have a specific tertiary structure and react with a specific substrate to produce a specific product.
Lowering the Activation Energy:
Activation Energy- The minimum amount of energy needed to start a reaction.
Enzymes lower the activation energy so that chemical reactions in cells occus with an acceptable temperature range and the overall rate of reaction is increased.
Lock and Key Hypothesis:
A substrate has a complimentary shape to the enzymes active site and forms an enzyme-substrate complex.
Effect of Temperature
An increase in temperature results in more collisons between reactant molecules. The rate of reaction increases up to the optimum temperature.…