Viruses and Prions Quiz
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Viruses mutate, and some viruses have not been discovered.
A. TRUE
B. FALSE
Viruses are the most common cause of acute infections that do not result in hospitalization.
A. TRUE
B. FALSE
Viruses that infect bacteria are specifically called ______.
A. viroids
B. bacteriophage
C. prions
D. satellite viruses
Spikes are glycoproteins that can be found projecting from the viral capsid.
A. TRUE
B. FALSE
Persistent viruses that can reactivate periodically are ______.
A. cytopathic
B. inclusion bodies
C. oncoviruses
D. chronic latent viruses
Viruses are not filterable.
A. TRUE
B. FALSE
Host cells of viruses include ______.
A. animals
B. plants
C. bacteria
D. all of these
Infectious protein particles are called ______.
A. spikes
B. viroids
C. virions
D. prions
What structures are used by bacteriophages to attach to host cell receptors?
A. nucleic acids
B. tail fibers
C. viral sheaths
D. capsid heads
A fully formed virus that can cause an infection in a host cell is called a virion.
A. TRUE
B. FALSE
Diagnosis of viral infections sometimes involves analyzing the patient’s blood for specific _____ that the immune system produces against the virus.
A. antibodies
B. antigens
C. complement proteins
D. glycoproteins
Visible, clear, well-defined patches in a monolayer of virus-infected cells in a culture are called ______.
A. colony
B. patch
C. plaque
D. pocks
A common method for cultivating viruses in the lab is to use in vitro systems called _____ cultures.
A. egg
B. cell
C. bacteriophage
D. embryo
Mammalian viruses capable of starting tumors are ______.
A. oncoviruses
B. latent
C. syncytia
D. inclusion bodies
Viruses are considered ultramicroscopic because they range in size from 2 mm to 450 mm.
A. TRUE
B. FALSE
Creutzfeldt-Jacob disease is _______.
A. a spongiform encephalopathy of humans
B. caused by a viroid
C. initiated by an oncogenic virus
D. also called “mad cow disease”
Prophages can be activated into viral replication and enter the lytic cycle.
A. TRUE
B. FALSE
Viruses exhibit all the following except ______.
A. shape
B. genes
C. ability to infect cells
D. metabolism
Viruses are used to produce vaccines for prevention of certain viral infections.
A. TRUE
B. FALSE
Infectious naked strands of RNA that affect plants are called ______.
A. viroids
B. virions
C. spikes
D. bacteriophage
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