Question

question 17
hfr transfer involves all of the following except ______.
a high frequency transfer
b independent plasmid transfer
c a pilus connection between f+ and f- cells
d f factor is part of the f+ donor chromosome
e gene integration into the bacterial chromosome

Explanation:

Hfr (High Frequency Recombination) transfer occurs when the F factor integrates into the bacterial chromosome of the donor cell. It involves pilus connection between F+ (Hfr) and F- cells, high-frequency transfer of chromosomal genes, and integration of transferred genes into the recipient's chromosome. Unlike F+ cells with independent plasmids, Hfr cells do not transfer the F factor as an independent plasmid—instead, the integrated F factor initiates transfer of chromosomal DNA.

Answer:

B. independent plasmid transfer