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Virology

Virology

Frage 1 von 23

1

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

Wähle eine oder mehr der folgenden:

  • ribosomes

  • metabolic processes

  • nucleic acid

  • glycoprotein

Erklärung

Frage 2 von 23

1

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

Wähle eine der folgenden:

  • nucleic acids

  • membrane structures

  • cytoplasm

  • genome

Erklärung

Frage 3 von 23

1

What is another name for a nonenveloped virus?

Wähle eine der folgenden:

  • enveloped virus

  • provirus

  • naked virus

  • latent virus

Erklärung

Frage 4 von 23

1

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

Wähle eins der folgenden:

  • WAHR
  • FALSCH

Erklärung

Frage 5 von 23

1

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

Wähle eine der folgenden:

  • lysogenic cycle

  • lytic cycle

  • prophage

  • temperate phage

Erklärung

Frage 6 von 23

1

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

Wähle eine der folgenden:

  • attachment

  • penetration

  • assembly

  • release

Erklärung

Frage 7 von 23

1

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

Wähle eine der folgenden:

  • a DNA-dependent DNA polymerase

  • RNA polymerase

  • ribosome

  • reverse transcriptase

Erklärung

Frage 8 von 23

1

A positive-strand RNA virus:

Wähle eine der folgenden:

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

  • can be used directly to translate viral proteins.

  • will be degraded by host enzymes.

  • is not recognized by host ribosomes.

Erklärung

Frage 9 von 23

1

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

Wähle eine der folgenden:

  • transduction

  • penetration

  • excision

  • translation

Erklärung

Frage 10 von 23

1

Fülle die Lücke, um den Text zu vervollständigen

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

Erklärung

Frage 11 von 23

1

Which of these infectious agents do not have nucleic acid?

Wähle eine der folgenden:

  • virions

  • viruses

  • bacteria

  • prions

Erklärung

Frage 12 von 23

1

Which of the following is true of prions?

Wähle eine der folgenden:

  • They can be inactivated by boiling at 100 °C

  • They contain a capsid.

  • They are a rogue form of protein, PrP.

  • They can be reliably inactivated by an autoclave.

Erklärung

Frage 13 von 23

1

Which of the following statements about virus structure is true?

Wähle eine der folgenden:

  • All viruses are encased in a viral membrane.

  • The capsomere is made up of small protein subunits called capsids.

  • DNA is the genetic material in all viruses.

  • Glycoproteins help the virus attach to the host cell.

Erklärung

Frage 14 von 23

1

Which statement is true?

Wähle eine der folgenden:

  • A virion contains DNA and RNA.

  • Viruses are acellular.

  • Viruses replicate outside of the cell.

  • Most viruses are easily visualized with a light microscope.

Erklärung

Frage 15 von 23

1

Which is true of DNA viruses?

Wähle eine der folgenden:

  • They use the host cell’s machinery to produce new copies of their genome.

  • They all have envelopes.

  • They are the only kind of viruses that can cause cancer.

  • They are not important plant pathogens.

Erklärung

Frage 16 von 23

1

Which of the following is not associated with prions?

Wähle eine der folgenden:

  • replicating shapes

  • mad cow disease

  • DNA

  • toxic proteins

Erklärung

Frage 17 von 23

1

Which statement is true of viroids?

Wähle eine der folgenden:

  • They are single-stranded RNA particles.

  • They reproduce only outside of the cell.

  • They produce proteins.

  • They affect both plants and animals.

Erklärung

Frage 18 von 23

1

Which is NOT a Baltimore classification of viruses?

Wähle eine der folgenden:

  • positive-strand DNA

  • negative-strand DNA

  • positive-strand RNA

  • negative-strand RNA

Erklärung

Frage 19 von 23

1

Group I uses its own or host DNA polymerases for replication.

Wähle eins der folgenden:

  • WAHR
  • FALSCH

Erklärung

Frage 20 von 23

1

Group I:
Group II:
Group III:
Group IV:
Group V:
Group VI:
Group VII:

Klicke und ziehe, um den Text zu vervollständigen.

    Double stranded DNA
    Single stranded DNA
    Double stranded RNA
    Positive single stranded RNA
    Negative single stranded RNA
    Retrovirus
    Double stranded DNA pararetrovirus

Erklärung

Frage 21 von 23

1

Spiders carry the Bluetongue virus into barns and fields. The virus causes high morbidity and mortality in ruminants. The Bluetongue virus is an orbivirus, which is part of the Reovirus family.

What is the Baltimore classification for Bluetongue virus?

Wähle eine der folgenden:

  • Group I

  • Group II

  • Group III

  • Group IV

  • Group V

Erklärung

Frage 22 von 23

1

Spiders carry the Bluetongue virus into barns and fields. The virus causes high morbidity and mortality in ruminants. The Bluetongue virus is an orbivirus, which is part of the Reovirus family.

What type of genome does the Bluetongue virus have?

Wähle eine der folgenden:

  • Single-stranded DNA

  • Double-stranded DNA

  • Single-stranded RNA

  • Double-stranded RNA

Erklärung

Frage 23 von 23

1

What’s the difference between a virion and a viroid?

Wähle eine der folgenden:

  • There’s no difference. The terms are synonymous

  • A viroid is bigger than a virion

  • A viroid only infects plants while a virion only infects animals

  • A viroid only has a capsid and no genetic material

  • A viroid only has RNA and no capsid

Erklärung

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