When a Bacterial Cell Is Infected with a Nonlytic Bacteriophage

Multiple Choice

When a bacterial cell is infected with a nonlytic bacteriophage with Tn5 on its chromosome,the frequency of Tn5 transposition is dramatically reduced if Tn5 is already maintained on the bacterial chromosome.Why?

A) Phage integration occurs via Tn5 homology disrupting the transposase.
B) Tn5 transposition is inhibited by phage gene products.
C) Tn5 on the bacterial chromosome expresses a repressor of transposition.
D) Transposase is not expressed from Tn5 elements integrated within the bacterial chromosome.
E) None of these