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Virus 200
Virus Detection Mechanisms
Viral Growth Curve Phases
Virus'
True or False
Virus 101
100
Another name for a non-enveloped virus.

Naked virus.

100
This method uses red blood cells and antibodies to detect the presence of a virus.

Hemagglutination Inhibition Assay (HIA)

100
The viral growth curve is a graphical representation of the log of the number of infectious particles over ____

time (in hours)

100
Most viruses infect a wide range of species.
False. Most are only able to infect cells of a narrow set of species.
100

Another word for virus

Phage

200

The genetic material (nucleic acid) of an "encapsulated" virus is located inside a protein structure called a ________.

Capsid

200

This molecular biology technique detects the presence of viral DNA or RNA (which leads to the identification of the virus).

Nucleic acid amplification test
200

viral particles are added to culture

Inoculation

200

Viruses can only be transmitted by direct contact.

False. Direct or indirect.

200

______ are viruses that infect bacteria

bacteriophages

300

Which of the following cannot be used to culture viruses?   Embryo, liquid medium only (nutrient broth), animal host, tissue culture.        WHY?

Liquid medium only
300

Change in the host cell shape, loss of adherence of host cell, disruption of host genome and integration of the viral genome into the host genome are _______  "cell abnormalities".

observable
300

Viral particles are undetectable in the medium.

Eclipse phase
300

Virus genetic material can be DNA or RNA.

True

300

In virus discovery, this botanist tested a filtered liquid that came from a mixture of water with infected plants and found that liquid did not have bacteria.

Dmitri Ivanovski
400

During which phase does a virus obtain its envelope.   Attachment, penetration, biosynthesis or release.

Release 
400

Similar to a "pregnancy test", this method utilizes a color change to indicate an interaction between an antibody with it's target antigen.

Enzyme immunoassay (EIA)
400

Viral particles begin appearing in medium.

Burst (rise) phase
400

Viral genetic material is only double stranded.

False. Can be single or double stranded.

400

Scientist who discovered viruses and described it as a "poison" made by bacteria.

Martinus Beijerinck

500

The two primary categories of persistent infections are: latent infection and ______ infection.

Chronic

500

TRUE OR FALSE. There are viruses that can infect other viruses.

True. 

500

Number of viral particles released per bacterium

Burst size

500

The Baltimore Classification system classifies viruses based upon; 1)their genetic material (DNA/RNA), 2)single or double-stranded, 3)their "mode of replication" and 4)the presence of a "cell membrane"

False. The presence of an "envelope".

500

State two characteristics of viruses

1. acellular (non-cellular)

2. do not reproduce on thier own (they need to be inside a host cell to reproduce themselves).

3. can infect every domain (bacteria, archea and/or eukaryotes)

4. genetic material can be DNA or RNA