True,Premature stop codons can be formed as a result of both nucleotide substitution and frameshift mutations.
Any colonies that emerge on the control in the Ames test should be the product of spontaneous mutations. Transduction requires cell-to-cell interaction to occur.A mutation is a change in an organism's DNA sequence. Mutations can develop as a result of errors in DNA replication during cell division, exposure to mutagens, or viral infection.
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