| A | B |
|---|
| Catalyst | a chemical that helps in a chemical reaction but is not consumed or changed in the reaction |
| Pepsin | an enzyme in the stomach to help digest proteins |
| Enzymes | a helper protein molecule in chemical reactions |
| Activation energy | the amount of energy needed to start a chemical reaction |
| Substrate | a reactant molecule on which the enzyme reacts |
| Active site | the area on an enzyme where the substrate fits in shape and chemistry |
| Products | the molecules that are formed after the chemical reaction is completed |
| Lock and key | the model to describe how enzymes are specific to one substrate |
| Denature | when a protein molecule changes shape and does not do its job |
| Temperature | too high will denature enzyme |
| pH | enzymes work best at an optimum pH |
| amylase | enzyme in saliva that digests carbohydrates |
