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Chapter 5

BIOL 1201 Chapter Notes - Chapter 5: Lytic Cycle, Capsomere, Bacteriophage

Biological Sciences
Course Code
BIOL 1201
Moroney, James

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Chapter 19
1. Viruses – obligated intracellular parasites
a. Structure
i. Genome
ii. Protein shell – capsid
iii. Envelope (membrane)
iv. Envelope with glycoprotein
b. Variations in viral genome
i. Double-stranded DNA (dsDNA)
ii. Single-stranded DNA (ssDNA)
iii. Double-stranded RNA (dsRNA)
iv. Single-stranded RNA (ssRNA)
c. Viral Reproduction (Lytic growth)
i. Infection of host cells
ii. Infected cell synthesizes viral genome and protein (capsid)
iii. Synthesis of other viral components
iv. Assembly of
v. Host cell lysis releases particles
d. Viral reproduction (lysogenic growth)
i. Infection of host cells
ii. Viral DNA integrates into host DNA
iii. Every time the cell reproduces, the virus also reproduces
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