Question 1

Which of the following is TRUE regarding the replication of bacteriophages in the lytic cycle?

Accepted Answer

Maturation is the assembly of phage DNA and proteins into complete virions.

Question 2

Which of the following viruses is classified as an oncogenic DNA virus?

Accepted Answer

Herpesviridae

Question 3

What is the main difference between persistent and latent viral infections?

Accepted Answer

Persistent infections remain in the host without causing symptoms, while latent infections periodically reactivate.

Question 4

Which laboratory technique is used to detect viral nucleic acids in a patient sample?

Accepted Answer

PCR (Polymerase Chain Reaction)

Question 5

Which of the following statements about prions is CORRECT?

Accepted Answer

Prions are inherited and transmissible by ingestion, transplant, and surgical instruments.

Question 6

A scientist is culturing animal viruses. Which of the following methods is LEAST likely to be used?

Accepted Answer

Growing viruses on a lawn of bacteria.

Question 7

Which of the following is a characteristic of most viruses?

Accepted Answer

They are intracellular parasites.

Question 8

Which of the following is TRUE about viral species?

Accepted Answer

Viral species share the same genetic information and ecological niche.

Question 9

Which step in the multiplication of animal viruses involves the synthesis of viral nucleic acid and proteins?

Accepted Answer

Biosynthesis

Question 10

Which of the following is a correct description of a viroid?

Accepted Answer

A small infectious RNA molecule that infects plants.

Question 11

A researcher observes that a virus can only infect specific types of cells in one host. What is the most likely explanation for this specificity?

Accepted Answer

The virus has specific host attachment sites and cellular factors.

Question 12

Which of the following is NOT a component of a typical virus structure?

Accepted Answer

Ribosome

Question 13

Which of the following best describes the process of specialized transduction?

Accepted Answer

Transfer of specific bacterial genes by a lysogenic phage.

Question 14

Which of the following viruses is known to cause latent infections?

Accepted Answer

Herpes simplex virus

Question 15

Which of the following is a correct statement about cell cultures used for growing viruses?

Accepted Answer

Continuous cell cultures can be maintained indefinitely.

Question 16

Which of the following is a function of the protein coat in viruses?

Accepted Answer

It protects the viral nucleic acid.

Question 17

Which of the following is TRUE about orthomyxoviridae?

Accepted Answer

They have single-stranded RNA and multiple RNA strands.

Question 18

Which of the following is a plausible consequence of prion infection in humans?

Accepted Answer

Accumulation of plaques in brain cells.

Question 19

Which of the following is a method used to detect antibodies against viruses in a patient?

Accepted Answer

Serological test

Question 20

Which of the following is TRUE regarding the release of animal viruses from host cells?

Accepted Answer

Release can occur by budding (for enveloped viruses) or by rupture of the host cell.

Comprehensive Study Notes on Viruses and Related Infectious Agents

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