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Virus Basics
Virus Structure
Virus Multiplication
Viral Infections
Virus Vocabulary
100
These are the 2 possible nucleic acids found in a virus genome.
What is DNA or RNA?
100
This virus shape has a capsid twisted into a shape like a garden hose.
What is a helical virus?
100
This occurs when a virus encounters a susceptible host cell and binds to receptor sites on the cell membrane.
What is adsorption?
100
A viral infection that can last from a few weeks to several years.
What is a persistant infection?
100
This is a piece of RNA that can cause a plant infection.
What is a virion?
200
The genetic material of a virus is located here.
What is a inside of the capsid?
200
This shape of virus is a 3D geometric figure with 12 corners and 20 sides.
What is isoscehedral virus?
200
This enters a host cell when penetration takes place.
What is the viral genome (DNA or RNA)?
200
This type of viral infection results in alternating periods of activity with symptoms and inactivity without symtoms.
What is a latent infection?
200
A well-defined clear patch in a cell layer grown in culture.
What is a plaque?
300
These are projections from the envelope of a virus.
What are spikes?
300
This type of virus has an envelope that surrounds the nucleus capsid.
What is enveloped virus?
300
This stage occurs when the host cell metabolism shifts to gene expression of the viral nucleic acid and produces the components of new viruses.
What is replication?
300
An infection that can cause a host cell to become cancerous.
What is an oncogenic virus?
300
A virus that infects bacteria.
What is a bacteriophage?
400
This type of microscope is used to see virus particles.
What is an electron microscope?
400
This subunit makes up the capsid of a virus.
What is a capsomer?
400
This is term describes the release stage when the host cell is destroyed by the virus.
What is lytic or virulent phase?
400
These are changes within a cell that damage it and can be seen with a light microscope.
What are cytopathic effects?
400
This type of enzyme is used by viruses and genetic engineers to make DNA from RNA.
What is reverse transcriptase?
500
Viruses need a host to replicate, it makes them this type of parasite.
What is an obligate intracellular parasite?
500
This structure found in some viruses originates from the host cell's plasma membrane.
What is the envelope?
500
This is a fully formed, extracellular viral particle that is virulent.
What is a virion?
500
These form when multiple host cells fuse together.
What are syncytia?
500
This term describes the affinity for viruses for a certain type of cell.
What is a tropism?