Question $10$

$2\mathrm{.}5$ pts

The complement protein cascade remains identical across the classical pathway, alternative pathway, and lectin pathway once the activation of occur$($s$)$ within the cascade. This shared characteristic underscores the convergence of these pathways at a specific point in the cascade, highlighting their commonality beyond the initial activation event.

C$3$

C$4$ and C$2$

C$2$

C$1$