VIRUSES FROM ANIMAL AND PLANTS QUIZ

Which type of interferon is produced by virus-infected cells?

β

None of these

Both (a) and (b)

α

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Supercoiling refers to the extra turns in the structure of ds DNA due to the action of

DNA gyrase

DNA pyrase

RNA gyrase

RNA pyrase

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Negri bodies are found in cells infected with

Vaccinia virus

Paramyxoviruses

Rabies virus

Fowlpox virus

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What is the function of positive strand in double stranded RNA viruses?

Synthesis of protein

Both (a) and (b)

Production of ribosomes

None of these

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Viral matrix proteins are

anchor the envelope of enveloped viruses

part of the nucleoprotein core of viruses

exposed on the surface of the virus

found mainly on naked viruses

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Mumps vaccine is prepared from the cultures of

chick fibroblasts

healthy calves

sheep

African green monkey cells

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Influenza virus undergoes antigenic shift resulting in major antigenic changes by which of the following mechanisms?

Somatic recombination of heavy and light chains

Changing the receptor binding canyon that docks with the host receptor

Reassortment of RNA segments from different influenza viruses

Expression of several different capsule types

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The transcription of the viral nucleic acid into mRNA is not necessary in case of

all of these

ss DNA viruses

ds DNA viruses

RNA viruses

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Intracytoplasmic inclusion bodies are found in cells infected with

Vaccinia virus

Rabies virus

all of these

Fowlpox virus

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West Nile virus can cause a disease in human beings that may be transmitted from an infected bird to a person by a mosquito. This is an example of

arthropod borne disease

nosocomial infection

fomite borne disease

endogenous infection

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