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Viruses From Animal and Plants

Viruses From Animal and Plants
What does the positive strand in double stranded RNA viruses stands for?

mRNA
tRNA
None of these
rRNA

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Viruses From Animal and Plants
Supercoiling refers to the extra turns in the structure of ds DNA due to the action of

RNA pyrase
DNA pyrase
RNA gyrase
DNA gyrase

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Viruses From Animal and Plants
Which of the following characteristics would not be used to classify viruses?

Symmetry
Presence of an envelope
Type of cell wall structure
Type of nucleic acid

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Viruses From Animal and Plants
Transfer of infection from cell to cell occurs mainly by direct transfer of virions via

none of these
cytodesmata
protodesmata
plasmodesmata

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Viruses From Animal and Plants
The tissue structure deteriorates as the virus multiplies. This deterioration is called

aneuploidy
cytopathic effect
none of these
protopathic effect

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Viruses From Animal and Plants
The transcription of the viral nucleic acid into mRNA is not necessary in case of

all of these
ss DNA viruses
RNA viruses
ds DNA viruses

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