| A | B |
| catalyst | substance that changes the rate of a rxn w/out being consumed |
| enzyme | biological catalyst |
| active site | area on enzyme that attaches to substrate |
| substrate | molecule that enzyme acts upon |
| activation energy | energy needed to start a chemical reaction |
| metabolism | all chemical activities in an organism |
| synthesis | reactions that "build up" molecules |
| decomposition | reactions that "break down" molecules |
| oxidation | rxn that results in the loss of electrons |
| reduction | rxn that results in the gain of electrons |
| ATP | "energy currency" of the cells |
| ADP | product of ATP decomposition |
| temperature | enzyme activity increases as this increases, but only up to a point |
| pH | optimal value varies based on the enzyme involved |
| specificity | enzymes operate within narrow ranges |
| inhibitors | molecules that block action of enzymes |