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microbiology MCQs

Practise focused microbiology questions with marked answers for exam preparation and subject revision.

microbiology Mcqs
1. The Window period in HIV infection means______________?
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A. The time lapse between obtaining the sample and detection of virus in the lab

B. The time lapse between the infection and development of AIDS

C. The time lapse between the infection and detection of viral antibodies

D. None of the above

2. Human immune deficiency virus is ________________ virus?
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A. Retro

B. Rheo

C. Rhabdo

D. Flavi

3. The classic opportunistic infection in acquired immune deficiency syndrome is_____________?
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A. Tuberculosis

B. Apthous stomatitis

C. Herpetic gingivostomatitis

D. Pneumocystis carinii pneumonia
4. Most common opportunistic infection in AIDS is_____________?
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A. Aspergilosis

B. Cryptococcosis

C. Candidiasis

D. Tuberculosis

5. Cytopathic effect is shown by_____________?
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A. Anaerobe

B. Bacteria

C. Spirochete

D. Virus
6. Viruses can be cultured in all except_______________?
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A. Guinea pigs

B. Blood agar

C. Chick embryo

D. Cell culture

7. Incubation pariod of herpes zoster is________________?
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A. 7-14 days

B. 1 months

C. 1-2 years

D. 3-6 months

8. Following hepatitis B infection through blood transfusion disease manifests in_____________?
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A. 6 months

B. 3 months

C. 1 week

D. 6 week

9. Which of the following would you consider to be general properties of viruses______________?
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A. Contain equal proportions of protein, lipo polysaccharide and nucleic acids

B. Contain DNA but no RNA

C. New virus particle arises directly (by division) from preexisting viruses

D. Fall in to the general size range of 200-3000 angstrom unit
10. Human immunodeficiency virus (HIV) affets_______________?
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A. Mast cells

B. Fibroblasts

C. Red blood cells

D. Helper T lymphocytes (CD4)
11. A rise in the anti-HBc immunoglobulin in a patient indicates________________?
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A. Prodromal phase

B. Convalescence

C. Carrier state

D. Acute infection
12. Influenza is caused by_____________?
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A. Paramyxo virus, which is a DNA virus

B. Orthomyxo virus, which is a RNA virus

C. Orthomyxo virus, which is a DNA virus

D. Paramyxo virus, which is a RNA virus

13. True about prions________________?
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A. Phase in which virus cannot be demonstrated in host cell

B. Viral components may be synthesized but maturation & assembling is defective

C. Viruses which are genetically deficient

D. Composed largely proteins without any nucleic acid
14. Both intranuclear and intracytoplasmic inclusions are present in which of the following viruses_____________?
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A. Hepatitis B virus

B. Pox virus

C. HIV

D. Measles virus
15. In which of the following immunization is given after infection is started________________?
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A. Influenza

B. Herpes

C. Rabies

D. Poliomyelitis

16. Herpes virus_____________?
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A. None of the above

B. Acquires its envelope from nucleolar membrane

C. Acquires its envelope from nuclear membrane

D. Acquires its envelope from cytoplasmi membrane

17. Pigs are important source of_____________?
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A. Yellow fever

B. Rabies

C. Japanese encephalitis

D. Kuru

18. Type I hypersensitivity is mediated by which of the following immunoglobulins ?
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A. IgM

B. IgA

C. IgE

D. IgG

19. Antibiotic sensitivity and resistance of micro organisms is determined by________________?
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A. ELISA

B. Culture

C. DNA probe

D. Direct microscopy

20. Man is the only reservoir for_______________?
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A. Salmonella

B. Camphylobacter jejuni

C. histolytica

D. Y. enterocolitica