(a)[2]
Inorganic catalysts often work better when heated, but enzymes seldom function at temperatures much above $45^\circ\text{C}$. Explain why this happens.
(b)[3]
Using the shape below as an enzyme, sketch how an enzyme shows specificity for breaking down one particular substrate molecule.
(c)[2]
Describe the effects of a competitive inhibitor and a non-competitive inhibitor on the interaction between enzyme and substrate.
(d(i))
The diagram below shows an enzyme-catalysed reaction. On the diagram, sketch the graph that would appear if the same reaction were carried out in the presence of a non-competitive inhibitor.
(d(ii))[3]
Explain why a non-competitive inhibitor produces this effect on the reaction.