| Term | Definition |
| peptide | bond joining amino acids together |
| amino acids | monomers in protein |
| R group | only part of amino acid that can differ |
| sequence of amino acids | primary level of protein structure |
| glycine | common amino acid in collagen |
| quaternary | level of protein structure of hameoglobin |
| H bonds | hold secondary level proteins in shape |
| active site | part of enzyme where reaction occurs |
| tertiary | level of protein structure in an enzyme |
| DNA | substance that codes for protein |
| pH | extreme changes of this will denature a protein |
| disulphide bond | strongest bond between neighbouring amino acids |
| ionic and H | 2 bonds that are altered by pH changes |
| prosthetic group | a non-protein part of an enzyme |
| structural | proteins that provide support e.g. collagen |
| globular | type of protein that is usually soluble |
| organelle that assembles proteins | ribosome |
| non-competitive | permanent type of enzyme inhibition |
| competitive | enzyme inhibitor with similar shape to the substrate |
| secondary | level of structure of beta-pleated sheet protein |