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Microbiology -Medical > Virology > Flashcards

Virology Flashcards

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USMLE® Step 1 flashcards Biology 101 flashcards
1
Q

Protein coat of virus is called ?/

593

A

Capsid

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2
Q

Subunits of capsid is called ??

A

Capsomers

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3
Q

Viral nucelic acids is called ??

A

DNA / RNA

Not both

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4
Q

Basic structure of virus - Content ??

A
  1. Viral nucleic acids
  2. Capsid
  3. Envelope

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4
Q

Function of envelope ??

A
  1. Protection
  2. Attachment to the target cell

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5
Q

All virus are - H/D ??

A

Haploid

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6
Q

Envelope content of a virus ??

A

Surface glycoprotein

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7
Q

Capsid made of — ??

A

Protein

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8
Q

Function of capsid ??

A
  1. Protection
  2. Attachment
  3. Act as antigen
  4. Provide structural symmetry of virus

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9
Q

Cuase of geometry symmetry of virus ??

A

Arrangement of capsomere

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10
Q

Geometry symmetry of virus type ??

A
  1. Icosahedral
  2. Helical
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11
Q

Icosahedral virus ??

A

20 triangle - symmetric figure

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12
Q

Helical capsomere of virus ??

A

Hollow coil - Rod shaped

envelope present

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13
Q

Virion definiton ??

A

Complete virus particle that is structurally intact & infectious `

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14
Q

Polio virion example ??

A

NA covered by protein coat

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15
Q

Herpes virion part ??

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A

Whole virus – Virion

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16
Q

Pseudovirus definition ??

A

PV contain host cell DNA instead of viral DNA within the capsid

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17
Q

Why non-enveloped viruses are resistant to detergent ??

A

The presence of an envelope confers instability on the virus

18
Q

Examples of atypical virus like Agents ??

A
  1. Defective
  2. Pseudovirus
  3. Viriods
  4. Prions

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19
Q

Defective virus definition ??

A

A virus that composed of viral nucleic acid & proteins but cannot replicate without a helper Virus

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19
Q

Example of defective virus ??

A

Hepatitis-D

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19
Q
A
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Q
A
20
Q
A
21
Q
A
22
Q

Viriods disease ??

A

Plant d
Not implicated Human diseases

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23
Q

Infection induces AB & Inflammation P/A in prions ??

A

NOOOOOOOO
in prions

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23
Q

Does prions have NA ??

A

NOOOOOOOOOOOOO

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23
Q

Defcetive virus cause ??

A

Mutation / deletion of part of their genetic amterials

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23
Q

Viriods NA ??

A

RNA

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23
Q

Protein coat & Envelope present where ??

A

Virus
Not in viriods

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23
Q

Virus NA ?

A

DNA / RNA

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24
Q

Prions appearance in Electron microscope ???

A

Filamentous rods
Amyloid like

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25
Q
A

Microbiology -Medical (29 decks)

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