Explanation

• Endotoxin is a component of the outer membrane of Gram-negative bacteria, and it is specifically associated with the presence of Lipopolysaccharides (LPS).
• LPS is a complex molecule composed of a lipid A anchor, a core oligosaccharide, and a repeating O-antigen polysaccharide chain. 
• The lipid A portion of LPS is responsible for its endotoxic activity, which can trigger a strong immune response and cause septic shock.