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Viruses

Viruses
Which of the following is semi-continuous (diploid) cell line?

KB
HEp-2
HeLa
WI-38

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Viruses
The envelope of which of the following viruses is derived from the host cell nucleus?

Herpesviruses
Retroviruses
Orthomyxoviruses
Paramyxoviruses

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

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

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Viruses
The most complex type of bacterial viruses having hexagonal head, a rigid tail with a contractile sheath and tall fibers is morphologically classified as

C
B
D
A

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Viruses
The viruses in an attenuated vaccine

have no genome
is altered with chemicals
continue to replicate
are usually larger than bacteria

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Viruses
The repressor protein, since the cell is resistant to lysis from externally infecting phage, is also called

immunity operon
immunity repressor
operon repressor
none of these

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