Question 1

Which of the following best describes the Baltimore classification system for viruses?

Accepted Answer

It groups viruses according to the relationship between their genome and messenger RNA ($$mRNA).$$

Question 2

A virus with a helical capsid, an envelope, and a single-stranded RNA genome most likely belongs to which group?

Accepted Answer

Orthomyxoviridae

Question 3

Which of the following steps is unique to the multiplication of animal viruses, but not bacteriophages?

Accepted Answer

Uncoating

Question 4

A patient presents with jaundice and is diagnosed with hepatitis B. Which type of viral genome does the causative agent possess?

Accepted Answer

Double-stranded DNA ($$dsDNA)$$

Question 5

Which of the following is a correct sequence of events in the lytic cycle of a bacteriophage?

Accepted Answer

Adsorption → Penetration → Replication → Assembly → Maturation → Release

Question 6

Which of the following statements about prions is TRUE?

Accepted Answer

They are infectious proteins that lack nucleic acids.

Question 7

A virus is described as having a brick-shaped morphology, a core membrane, and lateral bodies. Which virus is this most likely to be?

Accepted Answer

Poxvirus

Question 8

Which of the following best explains why enveloped viruses can establish persistent infections more readily than naked viruses?

Accepted Answer

They leave the host cell by budding, which does not immediately kill the cell.

Question 9

Which of the following is a cytopathic effect commonly associated with herpes simplex virus infection?

Accepted Answer

Cell fusion leading to multinucleated giant cells

Question 10

A scientist is studying a subviral agent that causes disease in plants and consists of a single-stranded circular RNA molecule. Which agent is being studied?

Accepted Answer

Viroid

Question 11

Which of the following viruses is most likely to cause a latent infection that can reactivate due to stress or immune suppression?

Accepted Answer

Herpes simplex virus

Question 12

Which of the following is a distinguishing feature of retroviruses?

Accepted Answer

They replicate via a DNA intermediate using reverse transcriptase.

Question 13

A virus is found to have a nucleocapsid surrounded by a lipid bilayer with embedded glycoprotein spikes. Which process most likely allowed this virus to exit its host cell?

Accepted Answer

Budding (exocytosis)

Question 14

Which of the following is TRUE regarding the genome of viruses?

Accepted Answer

Viral genomes can be linear or circular, and consist of either DNA or RNA.

Question 15

Which of the following best describes the function of capsomeres in a virus?

Accepted Answer

They are protein subunits that assemble to form the capsid.

Question 16

A patient is diagnosed with rabies after being bitten by a wild animal. Which type of viral genome does the rabies virus possess?

Accepted Answer

Single-stranded RNA ($$ssRNA)$$

Question 17

Which of the following is a key difference between viroids and virusoids?

Accepted Answer

Virusoids require a helper virus for replication, while viroids do not.

Question 18

Which of the following is a plausible outcome of a persistent viral infection?

Accepted Answer

Chronic infection with continuous virus production

Question 19

Which of the following viruses is most closely associated with the development of cervical carcinomas?

Accepted Answer

Papillomavirus

Question 20

A laboratory is using phage typing to identify a bacterial pathogen. Which property of bacteriophages makes this technique possible?

Accepted Answer

Each bacteriophage is highly specific for a particular bacterial species or strain.

Viruses: Structure, Classification, Multiplication, and Pathogenesis

Study Guide - Practice Questions

Study Guide - Flashcards