The Ames test involves exposure of a histidine requiring strain of Salmonella typhimurium. After the test, mutants grow on a medium that is histidine-free. These mutants are an example of ____________.

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     point mutation
      pyrimidine dimer formation
      back mutation
      site-direct mutagenesis
asked May 16, 2012 in Microbiology by anonymous
    

1 Answer

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back mutation
answered May 17, 2012 by Bioshare ~Top Expert~ (34,070 points)

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