The answer to this question is option b. The Ames test is used to identify mutants with restored biosynthetic activity.
The Ames test makes use of bacteria to ascertain if mutation can occur in the DNA of an organism using a certain chemical compound.
It can also be used to test if a drug possesses mutagenic properties. The bacteria strain that is used is the Salmonella typhimurium. The mutation of this bacteria occurs in histidine.
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