Micro Chapter 6 Viruses

25 terms by Shannonstapleton

Create a new folder

Advertisement Upgrade to remove ads

Foundations in Microbiology

Which is not a characteristic of viruses?
A) Viruses are obligate intracellular parasites
B) Viruses are active both inside and outside of host cells
C) Viruses can infect bacteria, protozoa, fungi, algae, plants, and animals
D) Viruses exhibit high specificity for their respective host

B

The main criteria used to group viruses are structure, chemical composition, and what other characteristic?
A) Type of capsid
B) Overall viral size
C) Area of host cell in which the virus multiplies
D) Similarities in genetic makeup
E) Presence and type of envelope

D

The combination of a viral nucleic acid plus the viral capsid is known as what?
A) Capsomers
B) Envelope
C) Phage
D) Nucleocapsid
E) Prophage

D

An enveloped virus may acquire its envelope from all but which of the following?
A) Nuclear envelope
B) Golgi apparatus
C) Endoplasmic reticulum
D) Cell membrane
E) Cytoplasmic membrane

B

Molecules that protrude from the viral envelope and which are essential for attachment are known as what?
A) Prophage
B) Extrusions
C) Prions
D) Plaques
E) Spikes

E

The viral envelope performs all but which of the following functions?
A) Neutralization of the virus
B) Protection of the viral nucleic acid
C) Binding to the host cell surface
D) Assisting in penetration of the viral nucleic acid
E) Stimulation of the host immune response

A

What type of virus has a polyhedral head, a helical tail, and fibers for host cell attachment?
A) Helical
B) Bacteriophages
C) Icosahedral
D) Enveloped
E) Naked

B

Collectively, viruses can contain all but what type of nucleic acid?
A) Double-stranded DNA
B) Double-stranded RNA
C) Double-stranded DNA/RNA hybrid
D) Single-stranded DNA
E) Single-stranded RNA

C

At the very minimum, a virus must carry genes for all but which of the following functions?
A) Mature virus packaging
B) Transcription of RNA to DNA
C) Viral capsid synthesis
D) Host regulation
E) Synthesis of viral genetic material

B

All of the following viruses can be involved in cancer except
A) HTLV I
B) HTLV II
C) Papilloma virus
D) Epstein-Barr virus
E) Rabies virus

E

What step in the viral multiplication cycle is defined as the copying and expression of the viral genome by the host's synthetic equipment?
A) Adsorption
B) Replication
C) Assembly and maturation
D) Release

B

Which method is not used to grow animal viruses?
A) Nutrient agar
B) Tissue culture
C) Live animals
D) Chicken eggs
E) Duck eggs

A

Most bacteriophages contain what type of nucleic acid?
A) Double-stranded DNA
B) Double-stranded RNA
C) Double-stranded DNA/RNA hybrid
D) Single-stranded DNA
E) Single-stranded RNA

A

Adsorption of the bacteriophage occurs when molecules on the tail fibers bind to what component on the host cell?
A) Capsomers
B) Nucleocapsid
C) Nucleus
D) Cell membrane
E) Receptors

E

Which is incorrect about viroids?
A) They have RNA
B) They have a capsid
C) They are smaller than ordinary viruses
D) They infect citrus trees
E) They are plant pathogens

B

The condition in which the host cell chromosome carries bacteriophage DNA is known as what?
A) Temperate
B) Prophage
C) Lysis
D) Lysogeny
E) Mutation

D

The membrane receptors that animal viruses typically attach to are actually what?
A) Virions
B) Glycoproteins
C) Capsids
D) Lipopolysaccharides
E) Cell walls

B

The limitation in the scope of hosts an animal virus can infect is known as what?
A) Tropism
B) Host range
C) Adsorption
D) Latency
E) Exocytosis

B

What does the nucleic acid of an animal virus do immediately upon entry into the host cell?
A) It duplicates itself
B) It becomes dormant
C) It alters the genetic expression of the host and instructs it to synthesize building blocks for new viruses
D) It causes the host cell to round up and produce inclusion bodies in the cytoplasm
E) It causes the host cell to enlarge and form multinucleated giant cells

C

Virus-induced damage to a cell that alters its microscopic appearance is known as what?
A) Lysis
B) Lysogeny
C) Chronic damage
D) Persistent damage
E) Cytopathic effects

E

Oncoviruses cause transformed cells to exhibit all but which of the following?
A) Increased rate of growth
B) Alterations in chromosomes
C) Changes in the cell's surface molecules
D) Production of reverse transcriptase
E) Capacity to divide for an indefinite period

D

What is viewed as a nearly perfect system for viral propagation?
A) Bird embryos
B) White mice
C) Guinea pigs
D) Humans
E) White rabbits

A

What defines a viral plaque?
A) The sticky substance that accumulates on teeth
B) Cell cultures infected by a virus
C) Freshly isolated animal tissue placed in growth medium
D) A line of cells that can grow continuously
E) Clear, well-defined areas in a monolayer of cells

E

Which of the following has been approved by the Department of Agriculture to be sprayed on livestock to prevent food infection?
A) bacteriophages
B) oncoviruses
C) adenoviruses
D) variola
E) parvovirus

A

"Mad cow disease" is the result of infection of cattle with what agent?
A) Bacteria
B) Viruses
C) Viroids
D) Prions
E) Delta agents

D

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set