Medical Quiz

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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