Examine the figure below.
Which of the following could happen to the pathogen depicted in this figure?

Question

Examine the figure below. 
Which of the following could happen to the pathogen depicted in this figure?

Quizplus · Accepted Answer

The figure shows the complement pathway, which ultimately leads to the formation of a membrane attack complex (MAC) that creates pores in the pathogen's plasma membrane, leading to its destruction. Therefore, the correct choice is C, where the complement proteins attract other complement proteins that would form a hole (MAC) in the pathogen's plasma membrane. Choice A is incorrect, as the complement protein does not infect self cells, but instead helps to destroy non-self cells, such as pathogens. Choice B is incorrect because complement proteins do not attract killer B cells, but they do attract phagocytic cells such as neutrophils and macrophages. Choice D is also incorrect because killer T cells do not inject toxins into pathogens, but instead recognize and destroy infected cells.

Examine the Figure Below