(a)[2]
Explain how the virus that causes measles is passed on.
(b(i))[2]
Explain the functions of the part labelled A in the antibody molecule shown in Fig. 2.1.
(b(ii))[1]
Explain the functions of the part labelled B in the antibody molecule shown in Fig. 2.1.
(b(iii))[1]
Explain the functions of the part labelled C in the antibody molecule shown in Fig. 2.1.