Question

Pathogen C3b surface fragments + degraded by factor I →

A) Initiates the alternative complement pathway
B) Activates the classical complement pathway
C) Leads to opsonization of the pathogen
D) Triggers the formation of the membrane attack complex

Answer 1

When the C3b surface fragments of a pathogen are degraded by factor I, it leads to the opsonization of the pathogen.

Step-by-step explanation:

The surface-bound C3b fragments of pathogen, when degraded by factor I, lead to the opsonization of the pathogen. Opsonization refers to the process of marking the pathogen for phagocytosis by immune cells. In this case, phagocytic cells such as macrophages and neutrophils are attracted to the site of infection and their receptors for surface-bound C3b opsonize the pathogen, making it easier for the immune cells to recognize and engulf it.