Chapter 13 Microbiology: Viruses and Prions || 100%
Errorless Answers.
what is the definition of a virus? correct answers a submicroscopic, parasitic, filterable agent
consisting of nucleic acid: DNA or RNA surrounded by a protein coat.
what is the definition of bacterium? correct answers prokaryotic organism, characterized by
peptidoglycan cell walls
viral species correct answers group of viruses sharing the same genetic info and ecological
niche
virology correct answers study of viruses
non-living agents that infect all life forms
general characteristics of viruses correct answers 1) obligatory intracellular parasites
2) filterable: can pass through bacterial filters
3) contain DNA OR RNA
4) contain a protein coat
5) some may be enclosed by an envelope
6) most are tissue specific
the protein coat of a virus is called a correct answers capsid
the capsid is made up of correct answers capsomeres, which are protein subunits
host range of a virus is determined by correct answers specific host attachment sites and
cellular factors
the capsid is made up of __________ and surrounds ________________ correct answers
proteins
DNA or RNA
the envelope is made up of correct answers cell membrane or vesicles
combination of lipids proteins and carbohydrates
phospolipid bi-layer
some enveloped viruses are covered in _________ . correct answers spikes
The spikes are composed of __________ and can help the virus to ___________. correct
answers carbohydrate protein complexes
attach
non-enveloped viruses correct answers are more difficult to kill
tissue tropism correct answers tissue specificity
specific tissue attachment
smallest virus is ___________. correct answers rhinovirus
, True or False: bacteriophages enter the cell correct answers FALSE, they do not enter the cell
virion correct answers complete fully developed viral particle
what is a helical virus and give an example correct answers resemble long rods that may be
rigid and flexible
ex: Rabies and Ebola
what is a polyhedral virus and give and example correct answers many sided virus and the
capsid is a polyhedron
ex: Herpes Simplex Virus and Poliovirus
Enveloped viruses are typically __________,an example is __________. correct answers
spherical
Herpes Simplex Virus
plaques correct answers a clearing in a bacterial lawn resulting from lysis by phages
herpesviridae correct answers 100 known viruses
DNA Virus
named after spreading appearance of cold sores
ex: HHV-1, HHV-2, HHV-3
Picornsviridae correct answers single stranded RNA Virus
Retroviridae correct answers RNA virus
these carry reverse transcriptase
reverse transcriptase correct answers uses viral RNA as a template to produce complementary
double stranded DNA
7 groups of Genome based Virus Classification correct answers 1) dsDNA virus
2) ssDNA virus
3) dsRNA virus
4) (+)ssRNA virus
5) (-) ssRNA virus
6) ssRNA-RT virus
7) dsDNA-RT virus
what is a dsDNA virus and give an example correct answers double stranded DNA virus
ex: Herpesvirus, Adenovirus
what is ssDNA virus and give and example correct answers single stranded DNA virus
ex: Parvoviruses
what is dsRNA virus and give and example correct answers double stranded RNA virus
ex: reovirus
Errorless Answers.
what is the definition of a virus? correct answers a submicroscopic, parasitic, filterable agent
consisting of nucleic acid: DNA or RNA surrounded by a protein coat.
what is the definition of bacterium? correct answers prokaryotic organism, characterized by
peptidoglycan cell walls
viral species correct answers group of viruses sharing the same genetic info and ecological
niche
virology correct answers study of viruses
non-living agents that infect all life forms
general characteristics of viruses correct answers 1) obligatory intracellular parasites
2) filterable: can pass through bacterial filters
3) contain DNA OR RNA
4) contain a protein coat
5) some may be enclosed by an envelope
6) most are tissue specific
the protein coat of a virus is called a correct answers capsid
the capsid is made up of correct answers capsomeres, which are protein subunits
host range of a virus is determined by correct answers specific host attachment sites and
cellular factors
the capsid is made up of __________ and surrounds ________________ correct answers
proteins
DNA or RNA
the envelope is made up of correct answers cell membrane or vesicles
combination of lipids proteins and carbohydrates
phospolipid bi-layer
some enveloped viruses are covered in _________ . correct answers spikes
The spikes are composed of __________ and can help the virus to ___________. correct
answers carbohydrate protein complexes
attach
non-enveloped viruses correct answers are more difficult to kill
tissue tropism correct answers tissue specificity
specific tissue attachment
smallest virus is ___________. correct answers rhinovirus
, True or False: bacteriophages enter the cell correct answers FALSE, they do not enter the cell
virion correct answers complete fully developed viral particle
what is a helical virus and give an example correct answers resemble long rods that may be
rigid and flexible
ex: Rabies and Ebola
what is a polyhedral virus and give and example correct answers many sided virus and the
capsid is a polyhedron
ex: Herpes Simplex Virus and Poliovirus
Enveloped viruses are typically __________,an example is __________. correct answers
spherical
Herpes Simplex Virus
plaques correct answers a clearing in a bacterial lawn resulting from lysis by phages
herpesviridae correct answers 100 known viruses
DNA Virus
named after spreading appearance of cold sores
ex: HHV-1, HHV-2, HHV-3
Picornsviridae correct answers single stranded RNA Virus
Retroviridae correct answers RNA virus
these carry reverse transcriptase
reverse transcriptase correct answers uses viral RNA as a template to produce complementary
double stranded DNA
7 groups of Genome based Virus Classification correct answers 1) dsDNA virus
2) ssDNA virus
3) dsRNA virus
4) (+)ssRNA virus
5) (-) ssRNA virus
6) ssRNA-RT virus
7) dsDNA-RT virus
what is a dsDNA virus and give an example correct answers double stranded DNA virus
ex: Herpesvirus, Adenovirus
what is ssDNA virus and give and example correct answers single stranded DNA virus
ex: Parvoviruses
what is dsRNA virus and give and example correct answers double stranded RNA virus
ex: reovirus
