<prompt> The subarachnoid space inflammation of bacterial meningitis, which is caused by a gram-negative bacterium, is induced by which one component of the bacteria?Matrix proteinLipopolysaccharide LPSPiliInner membrane  <response>: Ans. B. Lipopolysaccharide LPSENDOTOXINS: are part of the outer cell wall of gram negative bacteria. Lipopolysaccharides consists of three components:1 Lipid A2 Core polysaccharide3 O polysaccharide The biological activity of endo toxin is associated with the lipid A portion of LPS. 