The transfer of chromosomal DNA from an Hfr cell to a recipient cell involves

Hfr bacteria strains
a) transfer host chromosomal genes at a high rate
b) transfer genes on plasmids at a high rate
c) convert recipient cells to F- after conjugation
d) conjugate with F+ cells only

The transfer of chromosomal DNA from an Hfr cell to a recipient cell involves
a) conservative transposition
b) rolling circle replication
c) co-integration
d) all the above

merodiploid bacterial cells contain
a) one copy of the genome
b) two complete copies of the genome
c) one complete copy and one partial copy of the genome
d) two partial copies of the genome

The E. Coli genetic map is measured in
a) minutes
b) meters
c) base pairs
d) degrees

The E.coli genome is _______DNA.
a) circular double-stranded
b) linear double-stranded
c) circular single-stranded
d) linear double-stranded

Two leu- strains of E. Coli are conjugated and produce a leu+ merodiploid. This indicates that
a) both strains are mutant  in the same gene
b) the two strains carry a mutation in the exact same spot
c) one strain is a mutant, but the other one is not.
d) the two strains are mutant in different genes

An F- lac- E. Coli strain is mated with an F' lac+ cell. After conjugation, the recipient cell will be
a) F+
b) lac-
c) lac+
d) both a and c
e) all the above



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