Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

MIM 2 > 24. Properties of viruses > Flashcards

24. Properties of viruses Flashcards

1
Q

enveloped viruses are disrupted by ___

A

acid
detergents
drying
heat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what are the morphological groups of viruses?

A
  • naked icosahedral
  • enveloped icosahedral
  • naked helical
  • enveloped helical
  • complex
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

viruses are only visible under a __

A

electron microscope

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

how do you cultivate viruses?

A

living host cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

and enveloped virus is released by:

A

budding and cell lysis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

cell lines

A

diploid, 50-70 passages

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what happens to viral genomes of DNA viruses?

A

they remain in the infected cell, most reside in the nucleus (except pox viruses)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

a naked capsid is stable to

A
  • temperature
  • acid
  • proteases
  • detergents
  • drying
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

eclipse period

A

time from first infection to intracellular virus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

almost all viruses contain either __ or __ with the exception of __

A

DNA, RNA, CMV

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

steps in viral replication

A
  • recognition
  • attachment and penetration
  • uncoating
  • macromolecular synthesis
  • early mRNA codes for non-structural proteins
  • late mRNA codes for structural proteins
  • posttranslational modification of proteins
  • assembly of viral components
  • budding of enveloped viruses
  • release of virus
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

can cells replicate RNA?

A

no, RNA viruses must encode an RNA-dependent RNA polymerase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

most RNA viruses replicate in __

A

the cytoplasm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

enveloped virus components:

A

membrane
lipids
proteins
glycoproteins

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

viruses that don’t use the cell polymerase __

A

carry their own polymerase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

positive vs. negative strand RNA

A

positive- can be directly transcribed into a protein

negative- has to be transcribed by an enzyme into a positive strand

17
Q

what enzymes do viruses have for energy metabolism?

A

none

18
Q

established cell lines

A

heteroploid, continuous passage in vitro

19
Q

what do DNA polymerases require in order to replicate the viral genome?

A

a primer

20
Q

early genes tend to encode:

A

DNA-binding proteins

21
Q

late genes encode:

A

structural proteins

22
Q

structure of a virus

A

genome in a protective protein shell, capsid shell may be enclosed within an envelope that contains both protein and lipid

23
Q

naked helical viruses only exist in __

A

plants

24
Q

primary cell culture

A

diploid, 1-2 passages, taken from living things

25
Q

latent period

A

the period from intracellular infection to extracellular or released virions

26
Q

hemadsorption

A

test for certain viruses: add erythrocytes, measles virus releases hemaglutinin causing agglutination

27
Q

a naked capsid is released by:

A

lysis of the cell

MIM 2 (14 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions