| A | B |
|---|
| chemical reaction | process that changes one set of chemicals into another set of chemicals |
| reactants | elements or compounds that enter into a chemical reaction |
| products | elements or compounds released by a chemical reaction |
| activation energy | energy needed to start a chemical reaction |
| exothermic reaction | chemical reaction that releases energy into surroundings |
| endothermic reaction | chemical reaction that absorbs energy from surroundings |
| catalyst | a substance that speeds up the rate of a chemical reaction |
| enzyme | protein that acts as a biological catalyst |
| substrate | compound that participates in an enzyme catalyzed reaction |
| enzyme substrate complex | name given to stage of catalyzed reaction when enzyme is holding substrate in the active site |
| active site | part of 3D enzyme shape that holds substrates |
| lock and key theory | explanation of how enzyme shape specifically fits the substrates of the reaction it catalyzes |
