Discussion
Which type of bacterial genetic recombination involves the use of a viral vector?
Answer: C
Correct answer: Transduction
Transduction is the mode of bacterial recombination that uses a viral vector. A bacteriophage packages a fragment of host DNA into its capsid during assembly, and that particle injects bacterial rather than viral DNA into the next cell it infects, where it may recombine into the recipient's chromosome.
The DNA is protected inside the capsid throughout, so the process is unaffected by nucleases in the medium. Transformation uses naked DNA taken from the surroundings and conjugation needs direct cell contact; assimilation is not a mechanism of gene transfer.
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