A conditionally lethal, host range, bacteriophage mutant that produces nonsense codons and can replicate only in a host bacterium able to translate the nonsense codon; the mutation's effects are lethal (i.e., prevent replication of the virus) in a bacterium without such a suppressor mechanism.
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... the positional effect 3.In which of the following classes of genes do mutant genes fail to repress cell division? Silencer genes Oncogenes Tumor suppressor genes Operator genes Promoter genes 4.The reason v-oncs cause cancer whereas normal ...
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