Good, that's right.
At this point, the classical and alternative pathways join up to lead to the fomation of a membrane attack complex.
What is the first step in this shared terminal pathway ?
Cleavage of C5 to C5a and C5b
Fusion of C5a and C5b
Fusion of C5b and C6
Cleavage of C5b
Click on one of the choices above.