Question

Which of the following is a lipopolysaccharide released during lysis or destruction of gram negative bacteria...

Which of the following is a lipopolysaccharide released during lysis or destruction of gram negative bacteria that activates inflammatory response?
a) endotoxin
b) antitoxin
c) exotoxin
Science   Anatomy-And-Physiology   
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Answer #1

Answer is option 'a' - endotoxin.

  • The cell wall of Gram negative bacteria consists of an inner thin layer of peptidoglycan and an outer membrane. The outer membrane is made up of phospholipids and lipopolysaccharides.
  • The lipid content of the outer membrane is the endotoxin of Gram negative bacteria which is released only when the bacteria gets lysed.
  • The antitoxin is a type of antibody. It is a protein produced by some organisms including bacteria, to neutralize the effect of toxin.
  • The exotoxin is a protein released to the external environment by both Gram negative and Gram positive bacteria, but mostly by the Gram positive bacteria.
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