Microbes, Protists, and Fungi
TEACHING TRANSPARENCY
The Lytic and Lysogenic Cycles
F9
Phage λ
Viral DNA
5 The cell lyses,
which releases
the viruses.
LYTIC CYCLE
1 The virus attaches
to a cell and injects
its DNA.
3 The viral DNA
4 In the lytic
continues the lytic
cycle or enters the
lysogenic cycle.
cycle, new
viruses are
made.
8 The prophage may
Prophage
2 The viral DNA
circularizes.
LYSOGENIC CYCLE
6 In the lysogenic
cycle, viral DNA
integrates into
the host DNA.
Many
cell
divisions
7 The viral DNA is replicated
when the host cell replicates
its own DNA and divides.
leave the host DNA
and enter the
lytic cycle.
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Bacterial
chromosome