For the following six classes of enzymes:
a)    provide a description of what they do 1 mark x 6 classes = 6 marks
b)    list 2 3 examples 1 mark x 6 classes = 6 marks
c)    for one example for each class, state what reaction it is involved in, and include a diagram or image that illustrates your statement  2 marks x 6 = 12 marks

Oxidoreductases
Transferases
Hydrolases
Lyases
Isomerases
Ligases