LEcture 6

Question 1

Viruses alwayas have a _____ and a protein coat called the _____.

Answer 1

genome, capsid

Question 2

The most abundant microbe in the world are ____.

Answer 2

viruses

Question 3

The size of viruses range from ___ to ____ ____.

Answer 3

20 to 200 nm

Question 4

What are the 3 capsid variants?

Answer 4

1. Icosahedral
2. Filamentous
3. Complex

Question 5

Capsid with 20 triangular side, each triangle made of at least 3 identical capsid proteins.

Answer 5

Icosahedral capsid

Question 6

Long tube of protein with genome inside capsid structure.

Answer 6

Fiamentous (helical) capsid`

Question 7

Asymmetrical shape, mix of icosahedral and filamentous shapes capsid structure.

Answer 7

Complex structure

Question 8

Some viruses have an _____, made of a phospholipid bilayer, to allow the virus to bind to host cells.

Answer 8

envelope

Question 9

T/F: Viruses can have DNA and/or RNA

Answer 9

True

Question 10

Group I virus example

Answer 10

poxvirus

Question 11

Group I viruses have

Answer 11

dsDNA

Question 12

Group II virus example

Answer 12

Parvovirus

Question 13

Group II viruses have

Answer 13

ssDNA

Question 14

Group III virus example

Answer 14

Epizootic Hemorrhagic Disease

Question 15

Group III viruses have

Answer 15

dsRNA

Question 16

Group IV virus example

Answer 16

Poliovirus

Question 17

Group IV viruses have

Answer 17

+ssRNA

Question 18

Group V virus example

Answer 18

Influenza

Question 19

Gruop V viruses have

Answer 19

-ssRNA

Question 20

Group VI virus example

Answer 20

HIV

Question 21

Gruop VI viruses have

Answer 21

RNA retroviruses

Question 22

Group VII virus example

Answer 22

Hepatitus B

Question 23

Group VII viruses have

Answer 23

DNA pararetroviruses

Question 24

Bacteriophage life cycle

Answer 24

1. Attach
2. Inject
3. Replicate
4. Synthesize capsid proteins
5. Assemple progeny phage
6. Lyse cell wall to release progeny

Question 25

The ____-____ Experiment radioactively labeled ____ with 35S Methionine and radioactively labeled ____ with 32P Phosphate, infected E. coli, and found only 32P entered cells, not 35S.

Answer 25

Hershey-Chase, protein, DNA

Question 26

Cycle when phage quickly replicates

Answer 26

Lytic cycle

Question 27

Cycle when phage is dormant

Answer 27

Lysogenic

Question 28

Bacteriophages use cell components to ______ _____.

Answer 28

synthesize capside

Question 29

Bacteriophage progeny exit the host cell by ____ or, rearely, _____.

Answer 29

lysis, slow release

Question 30

Eukaryotic viruses ______ to a host cell receptor and enter the cell by endocytosis (_______).

Answer 30

attatch, viropexis

Question 31

DNA viruses must ______ to use host polymerase or replicate in cytoplasm withviral polymerase

Answer 31

go to cell nucleus

Question 32

RNA viruses must

Answer 32

encode a viral polymerase

Question 33

only ______ can be used at mRNA

Answer 33

+ssRNA

Question 34

All viruses make ______ with host ribosomes

Answer 34

proteins

Question 35

When viruses pass though the membrane, and the lipids surround the capsid to form an envelope.

Answer 35

Budding

Question 36

What are the three "stages" or culturing viruses?

Answer 36

1. virus binds to host 2. eclipse period 3. rapid rise period

Question 37

What is occuring during the eclipse period of culturing viruses

Answer 37

The viruses make proteins, genomes, and are assembling

Question 38

A colony of viruses is called a ____.

Answer 38

Plaque

Question 39

Viruses present in all _______, often at very _____ _______.

Answer 39

environments, high densities

Question 40

What is Naked RNA called?

Answer 40

Viroid

Question 41

Virus particles that are just proteins are called

Answer 41

prions

Question 42

Example of prions

Answer 42

Creutzfeld-Jakob Disease

Question 43

How do prionsPrion diseases are caused by the

Answer 43

misfolding of proteins

Question 44

What part of a virus consists of a protein shell?

Answer 44

Capsid

Question 45

Which of these is an example of a pathogen that is just nucleic acid?

Answer 45

Viroid