MCAT Question of the Day
    •

    Q:

    		 Coomassie Brilliant Blue is a stain used in many biological applications. The stain binds along the length of protein polypeptides and can then be detected by the resulting blue color from the bound dye-protein complex. This information suggests that

    I. A sample of proteins composed of 300 amino acids will produce a stronger stain than a sample of proteins composed of 200 amino acids, assuming the proteins are present in equimolar amounts
    II. A 20 mM solution of a protein composed of 300 amino acids will produce a stronger stain than a 15 mM solution of the same protein
    III. A 50 mM solution of proteins composed of 200 amino acids will stain stronger than a 25 mM solution of proteins composed of 400 amino acids.
    		 

    A

    		 I only

    B

    		 II only

    C

    		 III only

    D

    		 I and II only



    Protein Structure and Function |
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