Main Idea Details
184 Bacteria and Viruses
Section 18.2 Viruses and Prions (continued)
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
Model of one type of virus. Label its parts.
Synthesize why many viruses cannot pass from one species to
another.
Label steps A, B, C, D, and E of a lytic cycle in the figure below.
Use the following terms.
- Assembly • Attachment • Entry
- Lysis and Release • Replication
Viruses
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Viral Infection
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E
C
A
Bacteriophage
The bacteriophage
injects its nucleic acid
into the bacterial cell.
New virus
particles are
assembled.
The host’s
metabolic
machinery makes
viral nucleic acid
and proteins.
The host cell breaks open and
releases new virus particles.
Nucleic
acid
Bacterial DNA
Bacterial
host cell
B
D