Lytic cycle Lysogenic cycle Phage DNA Bacteriophage Bacterial chromosome New phages Phage injects its DNA into cytoplasm. On rare occasions, a prophage may be excised from host can bind to bacterial cells. chromosome. 88 Phage DNA directs the synthesis of Phage DNA many new Cell lyses and releases integrates into host Prophage DNA is copied when cells divide. phages. Host DNA is digested the new phages. chromosome. into fragments. Prophage Fragment of bacterial chromosome FIGURE 18.4 The lytic and lysogenic reproductive cycles of certain bacteriophages. Some bacteriophages, known as virulent phages, can only follow a lytic cycle. Other phages, called temperate phages, can follow either a lysogenic or lytic cycle. 0

Question

Which cycle produces new phage particles?

Lytic cycle
Lysogenic cycle
Phage DNA
Bacteriophage
Bacterial
chromosome
New phages
Phage injects
its DNA into
cytoplasm.
On rare occasions,
a prophage may be
excised from host
can bind to
bacterial
cells.
chromosome.
88
Phage DNA
directs the
synthesis of
Phage DNA
many new
Cell lyses
and releases
integrates
into host
Prophage DNA
is copied when
cells divide.
phages. Host
DNA is digested
the new phages.
chromosome.
into fragments.
Prophage
Fragment
of bacterial
chromosome
FIGURE 18.4 The lytic and lysogenic reproductive cycles of certain bacteriophages. Some bacteriophages, known as virulent phages, can
only follow a lytic cycle. Other phages, called temperate phages, can follow either a lysogenic or lytic cycle.
0
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Transcribed Image Text

Lytic cycle Lysogenic cycle Phage DNA Bacteriophage Bacterial chromosome New phages Phage injects its DNA into cytoplasm. On rare occasions, a prophage may be excised from host can bind to bacterial cells. chromosome. 88 Phage DNA directs the synthesis of Phage DNA many new Cell lyses and releases integrates into host Prophage DNA is copied when cells divide. phages. Host DNA is digested the new phages. chromosome. into fragments. Prophage Fragment of bacterial chromosome FIGURE 18.4 The lytic and lysogenic reproductive cycles of certain bacteriophages. Some bacteriophages, known as virulent phages, can only follow a lytic cycle. Other phages, called temperate phages, can follow either a lysogenic or lytic cycle. 0

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