Virus MCQs and Answers with FREE PDF

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1: Nucleic acid of viruses, included

A. DNA

B. RNA

C. DNA or RNA

D. None of theseAnswer

2: Virus size is determined by ‘protein’ coat named as

A. Cell wall

B. Capsid

C. Capsomere

D. Cell membraneAnswer

3: Prions’ are remarkably resistant to formaldehyde and

A. Acids

B. Nucleases

C. Bases

D. BuffersAnswer

4: All viruses are haploid, except

A. Influenza virus

B. Retrovirus

C. Pox viruses

D. ParvovirusAnswer

5: Missing function of defective viruses, provided by help of

A. Helper virus

B. Virion

C. Prion

D. Bacteriophages Answer

6: ‘Viroid’ lacks

A. DNA

B. RNA

C. Envelop

D. Cell membraneAnswer

7: ‘Prions’ lacks

A. Proteins

B. Capsids

C. Nucleic acids

D. EnvelopeAnswer

8: A single copy of ‘genome’ in all viruses, put it into a cell, known as

A. Diploid

B. Haploid

C. Polyploid

D. EuploidAnswer

9: ‘Capsid’ proteins and nucleic acid ‘genome’ combines to form

A. Capsid

B. Capsomere

C. Nucleocapsid

D. Nucleic acidnswer

10: When capsomeres are arranged in 20 triangles, resulting structure is called as

A. Helical

B. Icosahedral

C. Spiral

D. Triangular

11: Viruses which infect bacteria are called

A. microphages

B. bacteriophages

C. autophagy

D. Congo virusAnswer

12: Subunits of capsid are called

A. capsule

B. capsomeres

C. centromeres

D. centriolesswer

13: Virus depend on other plants and animals for its synthesis, that’s why it is called as

A. obligatory intracellular parasite

B. obligatory extracellular parasite

C. obligatory parasite

D. intracellular parasitewer

14: Number of capsid in a virus of common cold is

A. 252

B. 535

C. 250

D. 525swer

15: Disease of vascular lesions in epithelial layers of ectodermal tissues are formed in mouth or skin is known as

A. Herpes simplex

B. Influenza

C. Polio

D. MumpsAnswer

16: Creutzfeldt-Jakob disease, a human disease caused by

A. Virus

B. Viroid

C. Prion

D. Phagenswer

17: All helical viruses are enclosed in ‘nucleocapsid’ known as

A. Cell wall

B. Cell membrane

C. Envelop

D. BoundaryAnswer

18: Size range of ‘virus’ is

A. 20-300 nm

B. 50-300nm

C. 40-300nm

D. 80-350nmnswer

19: ‘Viroid’ cause diseases rarely in humans, but , mostly in

A. Plants

B. Animals

C. Horses

D. Camelsnswer

20: Viruses that contain host cell ‘DNA’ instead of viral ‘DNA’ is known as

A. Virion

B. Prion

C. Bacteriophages

D. Pseudoviruses

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