Medically relevant Gram-negative bacteria can be classified into several serological groups based on the expression of u

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Medically relevant Gram-negative bacteria can be classified intoseveral serological groups based on the expression of uniqueantigens on their cell surface. One such group of antigens arecalled O or somatic antigens. Of what bacterial structure is thisantigen a part?
a.
Pilus
b.
Lipopolysaccharide
c.
Cell wall
d.
Flagellum
e.
Cell membrane
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