Which of the Following is an Important Source of Endotoxin

Question

Which of the following is an important source of endotoxin in gram-negative species?
A) endospore
B) sex pilus
C) flagellum
D) cell wall
E) capsule

Accepted Answer

Endotoxin is a component of the outer membrane of gram-negative bacteria, specifically the lipopolysaccharide (LPS) layer of the cell wall. Therefore, the correct answer is the cell wall, choice D. Endospores are not relevant to endotoxin production, and neither are the sex pilus, flagellum, or capsule.