01
Fill in the blank
1 point
The genome together with its protein capsid is called the .
Free Practice Quiz Question List
7 Viruses and Other Acellular Agents Online Quiz Questions
Use this free practice quiz with 20 questions to review 7 Viruses and Other Acellular Agents, test your knowledge, and prepare for your next test or exam.
20 questions
02
True or false
1 point
A single virus has either a DNA genome or an RNA genome, but not both.
- A
True
- B
False
03
Choose one
1 point
A virus has a positive-sense single-stranded RNA genome. Which property of this genome helps explain how it can produce viral proteins?
- A
It must be copied into a complementary positive-sense strand before it can function as mRNA.
- B
It can function as mRNA.
- C
It is always double-stranded.
- D
It contains both DNA and RNA in the same viral genome.
04
Written response
1 point
In a bacterial lawn, what are the visible areas of cell destruction caused by bacteriophages called?
05
Fill in the blank
1 point
The tendency of a virus to infect particular tissues is called .
06
Choose one
1 point
A laboratory needs to cultivate a virus that infects animal cells. Which option can support viral cultivation?
- A
Ordinary cell-free nutrient agar
- B
A sterile broth containing nutrients but no cells
- C
A susceptible living cell culture
- D
A surface coated with viral proteins
07
True or false
1 point
ICTV taxonomy and the Baltimore system classify viruses using different main emphases.
- A
True
- B
False
08
Written response
1 point
Which Baltimore group contains viruses with positive-sense single-stranded RNA genomes? Enter the group as a Roman numeral.
09
Choose all
1 point
Which statements correctly describe what common virus-detection approaches detect or demonstrate? Select all correct answers.
- A
A nucleic acid test detects targeted viral genetic material.
- B
An antigen test detects viral proteins.
- C
Serology detects host antibodies to a virus.
- D
Culture can demonstrate viral replication in susceptible cells.
10
Choose one
1 point
A virus attaches to a cell using a compatible receptor, but the cell lacks conditions needed for viral replication. Which conclusion best explains why infection may not proceed?
- A
A virus can replicate in any cell to which it attaches.
- B
Host range depends only on the virus's genome type.
- C
Host-cell entry and intracellular compatibility both help determine which cells a virus can infect.
- D
A cell is susceptible whenever it has a membrane.
11
Choose all
1 point
Which conditions are specifically described as disrupting the lipid envelope of enveloped viruses? Select all correct answers.
- A
Conditions that leave lipids intact
- B
Detergents that disrupt lipids
- C
Host-cell receptors
- D
Solvents that disrupt lipids
12
Open ended
1 point
Explain how ICTV taxonomy differs from the Baltimore system in the information each uses to classify viruses and the main emphasis of each system.
13
Choose one
1 point
A bacteriophage attaches to a susceptible bacterium. Which entry mechanism is typical of bacteriophages?
- A
They commonly enter by membrane fusion with the bacterial cell.
- B
They commonly inject their genome into the bacterium.
- C
They enter only by endocytosis.
- D
They release their capsid into the bacterium by exocytosis.
14
Choose one
1 point
Which option lists two ways new virions may leave a host cell?
- A
Uncoating and attachment
- B
Endocytosis and genome replication
- C
Budding and exocytosis
- D
Assembly and entry
15
True or false
1 point
True or false: A single virus has both DNA and RNA as its genome.
- A
True
- B
False
16
Choose one
1 point
A virus has a positive-sense, single-stranded RNA genome that can function as mRNA. Which Baltimore group does it belong to?
- A
Group IV
- B
Group V
- C
Group VI
- D
Group III
17
Choose one
1 point
A virus loses infectivity after exposure to a detergent that disrupts lipids. Which property best explains this result?
- A
Its capsid is made of repeating protein subunits.
- B
Its genome must be RNA rather than DNA.
- C
Its lipid envelope may be disrupted, reducing its infectivity.
- D
It can reproduce without a host cell.
18
Written response
1 point
In a bacterial lawn, bacteriophages produce visible areas of cell destruction. What are these areas called?
19
Choose one
1 point
A clinician wants to test for a patient's antibodies to a virus to help assess prior exposure. Which detection approach is most directly suited to this purpose?
- A
A nucleic acid test
- B
An antigen test
- C
Serology
- D
Culture
20
Written response
1 point
A bacteriophage genome is maintained in a host bacterium and copied as the bacterium divides, rather than immediately producing progeny and lysing the cell. What is this state called?