MCAT Question of the Day
    •

    Q:

    		 Arginine has a pKa of 12.48. At which pH will >50% of the R-groups in a solution of arginine be positively charged?
    		 

    A

    		 13.58

    B

    		 12.48

    C

    		 11.09

    D

    		 Cannot be determined from the information given



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