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What is the correct answer?

4

One of the interesting features of viruses is that they

A. multiply only in the host cytoplasm

B. are made up of proteins only

C. behave as if they were plants

D. occur only inside bacteria

Correct Answer :

A. multiply only in the host cytoplasm


Related Questions

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Most of the antibiotics have no effect on viruses as

A. they kill all bacteria which form host of viruses

B. viruses have no metabolism of their own

C. viruses form endospores

D. viruses are too small in size

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The exception to the cell theory of Schleiden and Schwann are

A. viruses

B. bacteria

C. algae

D. fungi

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The smallest virus has a size of

A. 1 nm

B. 3 nm

C. 6 nm

D. 2 nm

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A virus contains

A. an outer protein coat and a central core of DNA or RNA

B. outer RNA or DNA and a central core of proteins

C. only nucleic acids

D. only protein coats

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Which of the following is an example of DNA containing plant virus ?

A. Tobacco mosaic virus

B. Potato mosaic virus

C. Cauliflower mosaic virus

D. Tomato mosaic virus

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Influenza virus contains

A. DNA

B. RNA

C. both DNA and RNA

D. none of these

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RNA particles causing symptoms like those of viral diseases is known as

A. virion

B. vira

C. viroid

D. none of these

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Virus which attacks E.coli is called

A. bacteriophage

B. coliphage

C. phytophage

D. zoophage

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Viruses were discovered by

A. Stanley

B. Iwanowiski

C. Twort

D. Herelle

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An antiviral substance produced by many vertebrates in response to viral In. fection for resisting the multiplication of viruses is known as

A. antivirin

B. antigen

C. virion

D. interferon

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Which of the following phenomenon is absent in virus ?

A. Replication

B. Mutation

C. Production of energy

D. Growth

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Where is the protein for protein coat of virus synthesized ?

A. RNA of the virus

B. DNA of the virus

C. RNA of the host

D. Ribosome of the host

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Viral DNA incorporated in host DNA is known as

A. prophage

B. vegephaege

C. cyanophage

D. phycophage

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One of the following discovered synthesis of DNA from RNA in Roux Sarcoma Virus

A. Smith

B. Temin

C. Twort

D. Mayer

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Rabies is caused by

A. viruses

B. slimemoulds

C. fungi

D. bacterium

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A stage in the replication of virus, when the cell wall of host is ruptured is known as

A. lesion

B. lysis

C. autolysis

D. haemolysis

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Viruses are believed to be

A. living organisms

B. non-living organisms

C. a transitional group between living and non-living world

D. living organisms which have lost the power of multiplication

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Coliphage mX 174 contains:

A. double stranded RNA

B. single stranded DNA

C. double stranded DNA

D. single stranded RNA

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A clear /.one lot uwhI in bacterial < olon due to viral action is railed

A. plaque

B. phnge

C. streak

D. krnn/

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Virus was crystallized and isolated first by

A. D. Iwanowski

B. F.C. Bawden

C. W.M. Stanley

D. K.M.Smith

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Viruses differ from living organisms in that, they

A. can grow inside a living host

B. can multiply inside a living host

C. can undergo mutation inside a living host

D. are non-cellular

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A bacteriophage and a yeast cell are similar in that, both

A. are colourless

B. have enzymes

C. have nucleic acids

D. none of these

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Viruses are defined as

A. a buch of genomes which are looking for a suitable host for replication

B. micro-organisms which contains DNA only

C. smallest micro-organisms causing disease

D. micro-organisms which contains RNA only

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Which of the following is a Capsid ?

A. Protein part of virus

B. Nucleic part of virus

C. Both (a) and (b)

D. None of these

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Which of the following is devoid of protein coat, with a constitution of RNA only ?

A. Tobacco mosaic virus

B. Poxvirus

C. Potato spindle tuber virus

D. None of these

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Genetic modification brought about by a virus in a bmleria is known as

A. transformation

B. transduction

C. conjugation

D. candidiasis

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Which of the following is a viral disease of potato ?

A. Early blight of potato

B. Late blight of potato

C. Leaf roll of potato

D. None of these

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Little leaf disease of brinjal is caused by

A. viruses

B. bacteria

C. fungi

D. none of these

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Virus is a.............................. stage between living and non-living.

A. balanced

B. threshold

C. transitional

D. none of these

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The disease in man caused by viruses is

A. mumps

B. cholera

C. typhoid

D. plague