The Ames test is used for determining whether a particular chemical acts as a mutagen.It does this by selecting for: A)new His^- mutations in Escherichia coli. B)revertants of His^- mutations in Escherichia coli. C)new His^- mutations in Salmonella typhimurium. D)revertants of His^- mutations in Salmonella typhimurium. E)both revertants and new His^- mutations in Escherichia coli.

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The Ames test uses strains of Salmonella typhimurium that carry mutations rendering them unable to synthesize histidine. The test measures the rate at which a chemical causes mutations that revert these strains to histidine independence, indicating mutagenic potential.

The Ames Test Is Used for Determining Whether a Particular