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BIMM 120 CH 6
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How do viruses evolve?
coevolve with host
three components of T4 bacteriophage
head, helical neck, tail fibers
what infects E. coli?
bacteriophage lambda
T/F - viruses have their own separate position on the tree of life
True
False
false; viruses are non-living
what mediates host recognition and attachment?
cell-surface receptors
what is the empty phage capsid left outside the cell called?
ghost
bacterial virus growth curve
one-step growth curve
three stages of one-step growth curve
eclipse period
rise period
lytic stage
In a virus, what is nucleic acid contained?
protein capsid
T/F - viral capsid cannot self-assemble
True
False
False
glycoprotein spikes
encoded by the virus and allow it to recognize and infect host cells
filamentous virus as ____ symmetry
helical
Five requirements for host infection
host recognition and attachment
genome entry
genome expression and replication
assembly of virions
exit and transmission
lytic vs. lysogenic
lytic kills host
lysogenic
: integrates into the cell's chromosome
lysogenic conversion
prophage genes can be expressed and change host phenotype
bacterial defense against bacteriophage (3)
genetic resistance
: alter receptor proteins
restriction endonuclease
CRISPR-CAS9
Author
andrewlee22087
ID
317079
Card Set
BIMM 120 CH 6
Description
bacteriology
Updated
2016-03-16T02:29:12Z
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