Viruses and Prions Quiz
Viruses mutate, and some viruses have not been discovered.
Viruses are the most common cause of acute infections that do not result in hospitalization.
Viruses that infect bacteria are specifically called ______.
D. satellite viruses
Spikes are glycoproteins that can be found projecting from the viral capsid.
Persistent viruses that can reactivate periodically are ______.
B. inclusion bodies
D. chronic latent viruses
Viruses are not filterable.
Host cells of viruses include ______.
D. all of these
Infectious protein particles are called ______.
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.
Diagnosis of viral infections sometimes involves analyzing the patient’s blood for specific _____ that the immune system produces against the virus.
C. complement proteins
Visible, clear, well-defined patches in a monolayer of virus-infected cells in a culture are called ______.
A common method for cultivating viruses in the lab is to use in vitro systems called _____ cultures.
Mammalian viruses capable of starting tumors are ______.
D. inclusion bodies
Viruses are considered ultramicroscopic because they range in size from 2 mm to 450 mm.
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.
Viruses exhibit all the following except ______.
C. ability to infect cells
Viruses are used to produce vaccines for prevention of certain viral infections.
Infectious naked strands of RNA that affect plants are called ______.
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