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Virology

Questão 1 de 23

1

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

Selecione uma ou mais das seguintes:

  • ribosomes

  • metabolic processes

  • nucleic acid

  • glycoprotein

Explicação

Questão 2 de 23

1

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

Selecione uma das seguintes:

  • nucleic acids

  • membrane structures

  • cytoplasm

  • genome

Explicação

Questão 3 de 23

1

What is another name for a nonenveloped virus?

Selecione uma das seguintes:

  • enveloped virus

  • provirus

  • naked virus

  • latent virus

Explicação

Questão 4 de 23

1

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

Selecione uma das opções:

  • VERDADEIRO
  • FALSO

Explicação

Questão 5 de 23

1

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

Selecione uma das seguintes:

  • lysogenic cycle

  • lytic cycle

  • prophage

  • temperate phage

Explicação

Questão 6 de 23

1

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

Selecione uma das seguintes:

  • attachment

  • penetration

  • assembly

  • release

Explicação

Questão 7 de 23

1

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

Selecione uma das seguintes:

  • a DNA-dependent DNA polymerase

  • RNA polymerase

  • ribosome

  • reverse transcriptase

Explicação

Questão 8 de 23

1

A positive-strand RNA virus:

Selecione uma das seguintes:

  • 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.

Explicação

Questão 9 de 23

1

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

Selecione uma das seguintes:

  • transduction

  • penetration

  • excision

  • translation

Explicação

Questão 10 de 23

1

Preencha o espaço em branco para completar o texto.

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

Explicação

Questão 11 de 23

1

Which of these infectious agents do not have nucleic acid?

Selecione uma das seguintes:

  • virions

  • viruses

  • bacteria

  • prions

Explicação

Questão 12 de 23

1

Which of the following is true of prions?

Selecione uma das seguintes:

  • 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.

Explicação

Questão 13 de 23

1

Which of the following statements about virus structure is true?

Selecione uma das seguintes:

  • 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.

Explicação

Questão 14 de 23

1

Which statement is true?

Selecione uma das seguintes:

  • A virion contains DNA and RNA.

  • Viruses are acellular.

  • Viruses replicate outside of the cell.

  • Most viruses are easily visualized with a light microscope.

Explicação

Questão 15 de 23

1

Which is true of DNA viruses?

Selecione uma das seguintes:

  • 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.

Explicação

Questão 16 de 23

1

Which of the following is not associated with prions?

Selecione uma das seguintes:

  • replicating shapes

  • mad cow disease

  • DNA

  • toxic proteins

Explicação

Questão 17 de 23

1

Which statement is true of viroids?

Selecione uma das seguintes:

  • They are single-stranded RNA particles.

  • They reproduce only outside of the cell.

  • They produce proteins.

  • They affect both plants and animals.

Explicação

Questão 18 de 23

1

Which is NOT a Baltimore classification of viruses?

Selecione uma das seguintes:

  • positive-strand DNA

  • negative-strand DNA

  • positive-strand RNA

  • negative-strand RNA

Explicação

Questão 19 de 23

1

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

Selecione uma das opções:

  • VERDADEIRO
  • FALSO

Explicação

Questão 20 de 23

1

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

Arraste e solte para completar o texto.

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

Explicação

Questão 21 de 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?

Selecione uma das seguintes:

  • Group I

  • Group II

  • Group III

  • Group IV

  • Group V

Explicação

Questão 22 de 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?

Selecione uma das seguintes:

  • Single-stranded DNA

  • Double-stranded DNA

  • Single-stranded RNA

  • Double-stranded RNA

Explicação

Questão 23 de 23

1

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

Selecione uma das seguintes:

  • 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

Explicação

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