The surface of bacterial cells is covered with proteins that the human body can recognize as belonging to a foreign, invading microorganism. These molecules are collectively referred to as ...

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    antigens.
    antibiotics.
    antibodies.
    antiseptics.
asked May 19, 2013 in Biology by anonymous
    

1 Answer

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antigens.
answered May 20, 2013 by Bioshare ~Top Expert~ (34,070 points)

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