Discussion
In lysogeny,
Answer: D
Correct answer: a bacteriophage genome is integrated into the bacterial genome
In lysogeny the phage genome is integrated into the bacterial chromosome as a prophage and is replicated passively with it at every cell division. No new virions are made while this lasts, and the lysogenic cell is immune to superinfection by the same phage until induction triggers the lytic cycle.
The other options describe different processes: transfer of bacterial DNA by a phage is transduction, uptake of double-stranded DNA from the environment is transformation, and it is transformation, not lysogeny, that extracellular nucleases would block, since lysogeny involves no naked DNA in the medium.
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