| Term | Definition |
| enzyme | a protein that speeds up the rate of a chemical reaction |
| activation energy | the energy needed to start a chemical reaction |
| weakens bonds | way of lowering activation energy by enzymes that break molecules apart |
| brings substrates together | way of lowering activation energy by enzymes that unite molecules |
| substrate | substance that is acted upon by an enzyme |
| active site | part of the enzyme to which the substrate attaches |
| -ase and -sin | endings (suffixes) found on the names of enzymes |
| -ose | endings (suffixes) found on many sugars and carbs |
| denaturation | fevers, excess pH and salt cause this in enzymes |