MCAT Question of the Day
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    Q:

    		 The Gram stain distinguishes what type of organisms?
    		 

    A

    		 Pathogenic bacteria versus nonpathogenic bacteria.

    B

    		 Bacteria with a single membrane and a thick layer of peptidoglycan versus bacteria with two membranes and a thin layer of peptidoglycan.

    C

    		 Bacteria with a cell wall versus bacteria without a cell wall.

    D

    		 Bacteria versus archaea.



    Prokaryotes |
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