| Myoglobin has a single chain, whereas hemoglobin is a ____. |
active site |
| A cofactor binds to an apoenzyme to form an active ____. |
cofactor |
| Proteins are linear chains of amino acids joined by ____ bonds. |
cysteine |
| Each of the four subunits of hemoglobin contain one ____ ion. |
holoenzyme |
| The substrate binds to the ____ of an enzyme. |
iron |
| A ____ is a non-protein molecule required for enzyme activity. |
peptide |
| Temperature and ____ are factors that affect enzyme activity. |
pH |
| In some proteins, ____ residues are joined by disulfide bonds. |
tetramer |
