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Microbiology > Viruses > Flashcards

Viruses Flashcards

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Biology 101 flashcards
1
Q

What is viruses’ size ?

A

10-300nm

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2
Q

What is the enzyme carried by negative polarity RNA viruses?

A

RNA dependant RNA polymerase

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3
Q

What capsid shape is commonly referred to as “spherical” ?

A

Icosahedral

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4
Q

What capsid shape is commonly referred to as “Rod shaped”?

A

Helical

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5
Q

Which is more virulent; Enveloped or Naked viruses?

A

Naked

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6
Q

What is the most famous example of a localised infection?

A

A common cold

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7
Q

Give an example of a virus exclusive to humans?

A

Measles

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8
Q

T/F; Cells concentration affects adsorption rate?

A

True

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9
Q

How many receptors does a cell have on its surface?

A

10^4 ~ 10^5

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10
Q

What does a virus envelope consist of?

A

Lipoproteins
(host cell lipid + viral proteins)

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11
Q

What feature of herpes virus causes tzanck cell ?

A

It penetrates using cell membrane fusion leaving its envelope behind

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12
Q

How can viruses leave the cytoplasmic vesicle after viropexis?

A

Acidity change or endosomal lysis

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13
Q

How can viral genome leave the Capsid in the cell?

A

Acidity change or digestion by cytoplasmic protease

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14
Q

Which step in virus Pathogenesis do we target for vaccines ?

A

Adsorption

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15
Q

Which step in virus pathogenesis is not targeted by scientists at all?

A

Assembly

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16
Q

T/F; chickenpox is caused by poxviridae ?

A

F; it is caused by HHV3 (Varicella-zoster virus)

17
Q

Poxviridae includes ……..?
(2 examples)

A

Vaccinia
Variola

18
Q

Polygraphs from 1400 BC revealed clinical signs of paralytic ……….?

A

Poliomyelitis

19
Q

Ramses V died because of ……..?

A

Smallpox

20
Q

Does deltaviridae have an enzyme?

A

It’s unknown

21
Q

Only ds rna virus?

A

Reovirus

22
Q

Only ss dna virus?

A

Parvovirus

23
Q

What 2 viruses combined to form swine flu?

A

Bird flu & human virus

24
Q

HHV1 =

A

HSV1

25
Q

HHV2 =

A

HSV2

26
Q

HHV3 =

A

VZV

27
Q

HHV4=

A

EBV

28
Q

HHV5 =

A

CMV

29
Q

HHV6 =

A

Roseolovirus

30
Q

HHV7 =

A

Roseolovirus

31
Q

HHV8 =

A

Kaposisarcoma

32
Q

…………….. has a diploid genome

A

Retrovirus

Microbiology (16 decks)

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