MCAT Question of the Day
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    Q:

    		 Urate oxidase is an enzyme found in organisms from bacteria to mammals and catalyzes nucleic acid degradation. Although humans have the gene, it is nonfunctional. Which of the following would best help identify the recency of the loss of function?
    		 

    A

    		 A measurement of the degree of mutation of the gene as compared with other functional genes.

    B

    		 A comparison of primate and other mammalian genes to identify the related species with the mutation in common.

    C

    		 An analysis of the number of nucleotides in the gene to assess the chances of mutation.

    D

    		 A test of whether reverting the gene to a functional form is lethal in humans.



    Evolution |
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