Endotoxins differ from exotoxins in that endotoxins______________?
Correct answer: D. activate complement by the alternate pathway
- A. are proteins
- B. are heat labile
- C. are highly antigenic
- D. activate complement by the alternate pathway
Explanation
Endotoxin is lipopolysaccharide, especially lipid A, and is heat stable, weakly antigenic and not a protein. Unlike exotoxins, it activates complement predominantly through the alternative pathway.
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