46. Fig. 27-13
F plasmid
F+
cell
F–
cell
Mating
ridge
Bacterial chromosome
Bacterial
chromosome
a) Conjugation and transfer of an F plasmid
F+
cell
F+
cell
F–
cell
b) Conjugation and transfer of part of an Hfr bacterial chromosome
factor
Hfr cell A+
A+
A+
A+
A+
A–
A– A–
A–
A+
Recombinant
F–
bacterium
52. Fig. 27-13-5
factor
Hfr cell
b) Conjugation and transfer of part of an Hfr bacterial chromosome
A+
A–
F–
cell
A+
A+
A–
A+
A+ A–
53. Fig. 27-13-6
factor
Hfr cell
b) Conjugation and transfer of part of an Hfr bacterial chromosome
A+
A–
F–
cell
A+
A+
A–
A+
A+ A–
Recombinant
F–
bacterium
A–
A+
91. Fig. 27-18i
CHLAMYDIAS
2.5µm
CYANOBACTERIA
SPIROCHETES
GRAM-POSITIVE BACTERIA
hlamydia (arrows) inside an
nimal cell (colorized TEM)
Leptospira, a spirochete
(colorized TEM)
5µm
50µm
wo species of Oscillatoria,
lamentous cyanobacteria (LM)
Streptomyces, the source of
many antibiotics (colorized SEM)
5µm
1µm
Hundreds of mycoplasmas
covering a human fibroblast
cell (colorized SEM)