virology Flashcards

1
Q

negative features

A
  • not visible
  • not complex
  • not treated with antibiotics
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2
Q

characteristics

A

core
capsid
envelope

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3
Q

core +capsid

A

nucleocapsid

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4
Q

genome consists of ….. type of …….. acid

A

1

nucelic

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5
Q

replication phases

A

infection
replicating
dormant

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6
Q

Na core holds

A

genome

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7
Q

protein capsid

A

has protein sub-units

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8
Q

what does the protein capsid do

A

protection

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9
Q

what does the protein capsid do in terms of attachment

A

no envelope is present

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10
Q

replication cycle

A

entry
multiplication
escape

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11
Q

6 stages

A
Adsorption 
Penetration
Uncoating
Synthesis
Assembly
Release
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12
Q

in adsorption. attach … to host cell

A

virion

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13
Q

in adsorption specific host cell

A

receptors

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14
Q

presence of receptors determines

A

infectivity

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15
Q

specifics of adsorption

polio virus receptors

A

primates only

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16
Q

HIV receptors

A

on T-helper white cells

17
Q

penetration by T4 phage:

A
  • attach to host cell by tail fibres
  • contraction of tail sheath
  • rigid tail core driven through cell envlope
  • viral DNA is now free to enter host cell
18
Q

retrovirus

A

-RNA genomes first copied to DNA then host enzyme and trancribe viral DNA

19
Q

release

A

host cells and virions are releases

20
Q

antiviral therapy

A

vaccination
inject antibodies
anti-resp strategy
anti-release strategy