(a)[4]
Outline the main features of an enzyme.
(b)[2]
Complete Fig. 2.1 so that it shows the reversible reaction catalysed by carbonic anhydrase inside red blood cells.
(c)[4]
A ribbon model of one molecule of carbonic anhydrase is shown in Fig. 2.2. The zinc ion is linked to the active site of the enzyme and is necessary for the enzyme to function. Carbonic anhydrase has primary, secondary and tertiary structure. Explain the extent to which Fig. 2.2 displays the primary, secondary and tertiary structure of carbonic anhydrase.