Acellular Pathogens
Acellular Pathogens

Acellular Pathogens

Lead Author(s): Openstax Content

Source: OpenStax

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Question pack on viruses, viroids, virusoids and prions.

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Question 1

The component(s) of a virus that is/are extended from the envelope for attachment is/are the:

A

capsomeres

B

spikes

C

nucleic acid

D

viral whiskers

Question 2

Which of the following does a virus lack? Select all that apply.

A

ribosomes

B

metabolic processes

C

nucleic acid

D

glycoprotein

Question 3

The envelope of a virus is derived from the host’s

A

nucleic acids

B

membrane structures

C

cytoplasm

D

genome

Question 4

In naming viruses, the family name ends with ______________ and genus name ends with ______________.

A

−virus; −viridae

B

−viridae; −virus

C

−virion; virus

D

−virus; virion

Question 5

What is another name for a nonenveloped virus?

A

enveloped virus

B

provirus

C

naked virus

D

latent virus

Question 6

Scientists have identified viruses that are able to infect fungal cells.

A

True

B

False

Question 7

A virus that infects a bacterium is called a/an ______________.

Question 8

A/an ______________ virus possesses characteristics of both a polyhedral and helical virus.

Question 9

A virus containing only nucleic acid and a capsid is called a/an ______________ virus or______________virus.

Question 10

The ______________ ______________ on the bacteriophage allow for binding to the bacterial cell.

Question 1

Which of the following leads to the destruction of the host cells?

A

lysogenic cycle

B

lytic cycle

C

prophage

D

temperate phage

Question 2

A virus obtains its envelope during which of the following phases?

A

attachment

B

penetration

C

assembly

D

release

Question 3

Which of the following components is brought into a cell by HIV?

A

a DNA-dependent DNA polymerase

B

RNA polymerase

C

ribosome

D

reverse transcriptase

Question 4

A positive-strand RNA virus:

A

must first be converted to a mRNA before it can be translated.

B

can be used directly to translate viral proteins.

C

will be degraded by host enzymes.

D

is not recognized by host ribosomes.

Question 5

What is the name for the transfer of genetic information from one bacterium to another bacterium by a phage?

A

transduction

B

penetration

C

excision

D

translation

Question 6

An enzyme from HIV that can make a copy of DNA from RNA is called ______________.

Question 7

For lytic viruses, ______________ is a phase during a viral growth curve when the virus is not detected.

Question 1

Which of the followings cannot be used to culture viruses?

A

tissue culture

B

liquid medium only

C

embryo

D

animal host

Question 2

Which of the following tests can be used to detect the presence of a specific virus?

A

EIA

B

RT-PCR

C

PCR

D

all of the above

Question 3

Which of the following is NOT a cytopathic effect?

A

transformation

B

cell fusion

C

mononucleated cell

D

inclusion bodies

Question 4

Viruses can be diagnosed and observed using a(n) ______________ microscope.

Question 5

Cell abnormalities resulting from a viral infection are called ______________ ______________.

Question 1

Which of these infectious agents do not have nucleic acid?

A

viroids

B

viruses

C

bacteria

D

prions

Question 2

Which of the following is true of prions?

A

They can be inactivated by boiling at 100 °C

B

They contain a capsid.

C

They are a rogue form of protein, PrP.

D

They can be reliably inactivated by an autoclave.

Question 3

Both viroids and virusoids have a(n) ______________ genome, but virusoids require a(n) ______________ to reproduce.