Medical Microbiology BSc MCQs Set-1

Medical Microbiology

1. Food poisoning is caused by 

a. Clostridium tetani 
b. Clostridium Welchii 
c. Diphtheria 
d. Clostridium botulinum 

Answer:d. Clostridium botulinum 

2. Koplic’s spots will develop in 

a. HIV 
b. Measles 
c. Mumps 
d. Rubella 

Answer:b. Measles

3. Viral DNA is resistant to DNA of the host cell because it contains 

a. 5’-HMC 
b. 5’-HMA 
c. 5’-CHM 
d. 5’MHC 

Answer:a. 5’-HMC

4. Which of the following is an example of live vaccine? 

a. Pertussis
b. Mumps
c. cholera
d. rabies 

Answer:c. cholera

5. Triple toxoid vaccine gives protection against 

a. Diphtheria, tetanus and rabies 
b. Tetanus, whooping cough, Tuberculosis 
c. Whooping cough, tetanus and Diphtheria 
d. Whooping cough, cancer and T.B. 

Answer:c. Whooping cough, tetanus and Diphtheria

6. Higher dose of chloramphenicol affects the eukaryotic cells because 

a. They have 30 S ribosomes 
b. They have mitochondria 
c. They have 70 S ribosomes 
d. None of the above 

Answer:b. They have mitochondria

7. AIDS is caused by

a. Retrovirus 
b. Prion 
c. Rhabdovirus 
d. Retroprison 

Answer:a. Retrovirus

8. Penicillin is a 

a. Primary metabolite 
b. Secondary metabolite 
c. Tertiary metabolite 
d. None of the above 

Answer:b. Secondary metabolite

9. The rejection of an organ transplant such as a kidney transplant, is an example of _____ Hypersensitivity. 

a. Immediate 
b. Delayed 
c. Allergy 
d. None of these 

Answer:a. Immediate

10. Listeriosis was ______ disease. 

a. Food borne 
b. Water borne 
c. Milk borne 
d. Air borne 

Answer:a. Food borne

11. Pus-forming forms are called as 

a. Pyoderm
b. Pyogenic 
c. Pyrogen 
d. None of the above 

Answer:b. Pyogenic

12. In Elisa technique, the antibodies are labeled by 

a. Acridine orange 
b. Alkaline phosphatase 
c. Neutral red 
d. Bromothymol blue 

Answer:b. Alkaline phosphatase 

13. _____ is a genetic disease characterized by a total or partial inability to synthesize globulins. 

a. Apitososis 
b. Agammaglobulinemia 
c. Gammaglobulinemia 
d. Sickle-cell anemia. 

Answer:b. Agammaglobulinemia

14. A study involving analysis of risk for genetic defects in a family is 

a. Genetic Engineering 
b. Genetic counseling 
c. Genetic drift 
d. Genetic equilibrium 

Answer:d. Genetic equilibrium

15. Viral antigens are likely 

a. Proteins
b. Glycoproteins 
c. Lipo proteins 
d. Both a and b 

Answer:d. Both a and b

16. The suitable assay method for antibiotics is 

a. Enzymatic assay 
b. Turbidimetric assay 
c. End point determination assay 
d. Metabolic assay 

Answer:c. End point determination assay

17. ELISA test is used for the identification of 

a. Jaundice 
b. AIDS 
c. Cancer 
d. Diabetes 

Answer:b. AIDS 

18. Incubation period for infective Hepatitis disease 

a. 45 – 80 days 
b. 15 – 35 days 
c. 35 – 50 days 
d. 5 – 15 days 

Answer:d. 5 – 15 days

19. All of the following are bacteriostatic chemotherapeutic agents except 

a. Bacitracin 
b. Chloramphenicol 
c. Novobiocin 
d. Tetracycline 

Answer:a. Bacitracin 

20. Kinetosomes are observed in 

a. Algae 
b. Fungi 
c. Protozoa 
d. Viruses 

Answer:c. Protozoa

21. β-lactam ring is present in 

a. Erythromycin 
b. Penicillin 
c. Tetracycline 
d. Chloramphenicol 

Answer:b. Penicillin

22. Antibiotics produced from streptomyces orientalis is 

a. Streptomycin 
b. Penicillin 
c. Vancomycin 
d. Both a and b 

Answer:c. Vancomycin 

23. The drug of choice for dermal, oral and vaginal candidiasis is 

a. Griseofulvin 
b. Amphotericin B 
c. Gentian violet 
d. Nystatin 

Answer:d. Nystatin

24. Botulism means 

a. Food adulteration 
b. Food poisoning by streptococcus bacteria 
c. Chemical contamination of food 
d. Food processing 

Answer:c. Chemical contamination of food 

25. Chloramphenicol is obtained from 

a. Streptomyces griseus 
b. Streptomyces venezuelae 
c. Streptomyces pyogenes 
d. None of these 

Answer:b. Streptomyces venezuelae

26. Streptomycin is obtained from 

a. Streptococcus species
b. Streptomyces griseus 
c. Staphylococcus aureus 
d. None of these 

Answer:a. Streptococcus species

27. The treatment required for small bodies of water is 

a. Disinfection 
b. Filtration 
c. Purification 
d. All of these 

Answer:d. All of these

28. Surface ropiness is caused by 

a. Alcaligenes viscolactis 
b. Streptococcus 
c. both a and b 
d. None of these 

Answer:d. None of these

29. Septicaemia is 

a. Bacteria in blood 
b. Toxin in blood 
c. Pus in blood 
d. Multiplication of bacteria and toxins in blood 

Answer:d. Multiplication of bacteria and toxins in blood

30. In AIDS, Kaposi’s sarcoma may respond to 

a. Interleukin – 2 infusion 
b. Azathioprine 
c. Alpha interferon 
d. None of these

Answer:c. Alpha interferon

31. Ciprofloxacin acts by inhibiting 

a. Cell Wall synthesis 
b. RNA synthesis 
c. Folate synthesis 
d. DNA gyrase 

Answer:d. DNA gyrase 

32. Lyme disease is caused by 

a. Bacteria 
b. Fungi 
c. Spirochaete 
d. Virus 

Answer:c. Spirochaete

33. Toxic shock syndrome is caused by 

a. Staph. albus 
b. Staph. aureus 
c. Strep. viridana 
d. None of these 

Answer:b. Staph. aureus

34. Black water fever is caused by 

a. P. vivax 
b. P. falciparum 
c. P. ovale 
d. None of these 

Answer:b. P. falciparum

35. Mantoux test detects 

a. M. tuberculosis 
b. Cyanobacteria 
c. Clostridia 
d. Both a and b 

Answer:a. M. tuberculosis 

36. The antibiotic acting on cell wall is 

a. Bacitracin 
b. Penicillin 
c. Cyclosporine 
d. All of these 

Answer:d. All of these

37. Aflatoxin is produced by 

a. Aspergillus sps 
b. Penicillium sps 
c. Alternaria sps 
d. None of these 

Answer:a. Aspergillus sps

38. Penicillin is discovered by 

a. Fleming 
b. Pasteur 
c. Koch 
d. None of these 

Answer:a. Fleming 

39. Antibiotics used in combination may demonstrate 

a. Synergism 
b. Antagonism 
c. both 
d. None of these 

Answer:c. both

40. The drug of choice in anaphylactic shock is 

a. Histamine
b. Corticosteroid 
c. Epinephrine 
d. None of these 

Answer:c. Epinephrine

41. Drugs of choice for treatment of Mycoplasma infections: 

a. Tetracyclines 
b. Erythromycin 
c. a and b 
d. Penicillins 

Answer:c. a and b

42. A number of viruses are known to infect mycoplasmas, called 

a. Bacteriophages 
b. Mycoplasma phages 
c. Virions 
d. Tiny strains 

Answer:b. Mycoplasma phages

43. The following are true about Rickettsiae. 

a. Unicellular organisms 
b. Prokaryotic intracellular parasites 
c. Presence of 70 S ribosomes 
d. It causes hemolysis in human beings 
e. Gram negative pleomorphic rods 

Answer:d. It causes hemolysis in human beings 

44. The causative agent of scrub typhus: 

a. R.Quintana 
b. R.rickettsii 
c. R.orientalis 
d. R.prowazekii 

Answer:c. R.orientalis

45. Lymphogranuloma venerum (LGV) is a sexually transmitted disease caused by 

a. Ophthalmia 
b. C.trachomatis 
c. C.pneumonias 
d. C.psittaci 

Answer:b. C.trachomatis

46. Intradermal test employed for diagnosis of LGV is 

a. Frei test 
b. Mantoux test 
c. Schick test 
d. Dick test 

Answer:a. Frei test

47. Which algae are pathogenic to humans? 

a. Cephaleuros 
b. Ulothrix 
c. Macrocystis 
d. Prototheca 

Answer:d. Prototheca

48. Erythromycin is obtained from 

a. S.griseus 
b. S.rimosus 
c. S.scabies 
d. S.erythraeus 

Answer:d. S.erythraeus

49. Common cold is caused by 

a. Adenovirus 
b. Coronavirus 
c. Hepatitis virus 
d. Pox virus 

Answer:b. Coronavirus 

50. The causative agent of conjunctivitis: 

a. Adenovirus 
b. Coronavirus 
c. Paramyxovirus 
d. None of these

Answer:a. Adenovirus