Biology Multiple Choice Questions and Answers for Different Competitive Exams

Multiple Choice Questions on Virus

16. Viruses multiplies in
a) Soil
b) Dead tissue
c) Living tissue
d) Culture medium
17. Prophase refers to
a) Viral genome outside the host cell
b) Viral genome that integrates with the bacterial genome
c) Viral genome in the culture medium
d) Newly synthesized viral genome within the host cell
18. Longest known virus is
TEM Gold Labeled antibody applied to negatively stained Citrus Tristeza virus particle

a) Ø x 174
b) T 1 phage
c) TMV
d) Citrus tristeza
19. Who crystallised and isolated viruses for the first time
a) W.M Stanely
b) F.C. Bawden
c) K.M. Smith
d) D. Ivanowski
20. Which of the following plant virus has DNA in it?
a) Tobacco Mosaic Virus
b) Potato Mosaic Virus
c) Tomato Mosaic Virus
d) Cauliflower Mosaic Virus
21. The Bacteriophage contains an enzyme known as
a) dehydrogenase
b) urease
c) Protease
d) lysozyme
22. Virion is
a) Nucleic acid of virus
b) Protein of virus
c) Antiviral agent
d) Completely assembled virus outside host
23. Which of the following pair of diseases is caused by virus?
a) Rabies, Measles
b) Typhoid, Tetanus
c) Cholera, Tuberculosis
d) AIDS, Syphilis
24. Viral Diseases have no cure because
a) Viruses have no cell wall
b) Presence of capsid
c) Virus possesses no cytoplasm
d) Viruses can multiply repeatedly within the host cell
25. AIDS virus has effect upon
a) Leucocytes
b) Lymphocytes
c) Erythrocytes
d) Thrombocytes

Answers
16. c) Living tissue
17. b) Viral genome that integrates with the bacterial genome
18. d) Citrus tristeza
19. a) W.M Stanely
20.d) Cauliflower Mosaic Virus
21. d) lysozyme
22. d) Completely assembled virus outside host
23. a) Rabies, Measles
24. d) Viruses can multiply repeatedly within the host cell
25. b) Lymphocytes
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