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Viruses

Viruses
The size of viruses is usually measured in

millimeters
nanometers
centimeters
micrometers

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Viruses
Which of the following viruses show/s transformation of infected cells?

All of these
Hepatitis B virus
Human T cell lymphotronic virus type I
Epstein-Barr virus

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Viruses
In the simplest capsid, there is a capsomere at each of the 12 vertices; this capsomere, which is surrounded by five other capsomeres, is termed a

helical
polyhedra
penton
icosahedral

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Viruses
The most popular indirect method of counting virus particles is by

colony counting
plaque-assay
counting plaque-forming units
hemagglutination assay

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Viruses
Which of the following is not true of virions?

Are extracellular
Contain RNA
Reproduce independently
Contain DNA

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Viruses
The viral DNA of the temperate phage, instead of taking over the functions of the cell's genes, is incorporated into the host DNA and becomes a prophage in the bacterial chromosome, acting as a gene. This happens in

lytic phase
none of these
lysogeny
spontaneous induction

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