Phage -Transducing particle 1 A bacteriophage attaches to a specific receptor on a host cell. 1 A transducing particle attaches to a specific receptor on a host cell. Bacterial DNA 2 The phage DNA enters the cell. The empty phage coat remains on the outside of the bacterium. The bacterial DNA is injected into a cell. 3 Enzymes encoded by the phage genome cut the bacterial DNA into small pieces. 3 The injected bacterial DNA integrates into the chromosome by homologous recombination. Replaced host DNA 4 Phage nucleic acid is replicated and coat proteins synthesized. Bacteria multiply with new genetic material. Replaced host DNA is degraded. 5 During construction of viral particles, bacterial DNA can mistakenly enter a protein coat. This creates a transducing particle that carries bacterial DNA instead of phage DNA. (b) The process of transduction Transducing particle O FIGURE 8.20 Generalized Transduction (a) An error during construction of phage particles produces a transducing particle, which contains bacterial DNA instead of phage DNA. (b) The bacterial DNA carried by the transducing particle is injected into a new host, resulting in generalized transduction. Essentially any bacterial gene can be (a) Formation of a transducing particle transferred this wav.

Human Anatomy & Physiology (11th Edition)
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Chapter1: The Human Body: An Orientation
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After a phage injects its DNA into a bacterial cell, the cell begins making proteins that make up the phage coat. Why does the same thing not happen when a generalized transducing particle injects the DNA it carries?

Phage
-Transducing particle
1 A bacteriophage attaches to a
specific receptor on a host cell.
1 A transducing particle
attaches to a specific
receptor on a host cell.
Bacterial
DNA
2 The phage DNA enters the cell.
The empty phage coat remains
on the outside of the bacterium.
The bacterial DNA is
injected into a cell.
3 Enzymes encoded by the
phage genome cut the bacterial
DNA into small pieces.
3 The injected bacterial
DNA integrates into the
chromosome by
homologous recombination.
Replaced
host DNA
4 Phage nucleic acid is replicated
and coat proteins synthesized.
Bacteria multiply with new genetic material.
Replaced host DNA is degraded.
5 During construction of viral
particles, bacterial DNA can
mistakenly enter a protein coat.
This creates a transducing
particle that carries bacterial
DNA instead of phage DNA.
(b) The process of transduction
Transducing
particle
O FIGURE 8.20 Generalized Transduction (a) An error during
construction of phage particles produces a transducing particle, which
contains bacterial DNA instead of phage DNA. (b) The bacterial DNA
carried by the transducing particle is injected into a new host, resulting
in generalized transduction. Essentially any bacterial gene can be
(a) Formation of a transducing particle
transferred this wav.
Transcribed Image Text:Phage -Transducing particle 1 A bacteriophage attaches to a specific receptor on a host cell. 1 A transducing particle attaches to a specific receptor on a host cell. Bacterial DNA 2 The phage DNA enters the cell. The empty phage coat remains on the outside of the bacterium. The bacterial DNA is injected into a cell. 3 Enzymes encoded by the phage genome cut the bacterial DNA into small pieces. 3 The injected bacterial DNA integrates into the chromosome by homologous recombination. Replaced host DNA 4 Phage nucleic acid is replicated and coat proteins synthesized. Bacteria multiply with new genetic material. Replaced host DNA is degraded. 5 During construction of viral particles, bacterial DNA can mistakenly enter a protein coat. This creates a transducing particle that carries bacterial DNA instead of phage DNA. (b) The process of transduction Transducing particle O FIGURE 8.20 Generalized Transduction (a) An error during construction of phage particles produces a transducing particle, which contains bacterial DNA instead of phage DNA. (b) The bacterial DNA carried by the transducing particle is injected into a new host, resulting in generalized transduction. Essentially any bacterial gene can be (a) Formation of a transducing particle transferred this wav.
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