Quiznetik

Microbiology | Set 4

1. Streptococcus forms causes which type of infections?

Correct : D. None of these

2. Streptococcus pyogenes classification is based on

Correct : A. Protein M

3. α-haemolytic streptococci are also known as

Correct : C. Viridans group

4. Streptolysin O is inactivated by

Correct : C. Oxygen

5. Streptolysin ‘S’ is

Correct : C. Oxygen stable

6. Influenza virus is identified by using

Correct : A. Haemaggulutinin inhibition test

7. Growth of influenza virus is identified by

Correct : B. Hela cells

8. Glutamic acid is oxidized by the species except

Correct : D. B.canis

9. “Prozone phenomenon” is encountered in

Correct : B. Brucella

10. Of the following, this is a capsulated organism

Correct : A. Bacillus anthraci

11. Anthrax is a

Correct : B. Zoonotic infection

12. Mc Fadyean’s reaction is used to detect

Correct : A. Bacillus anthraci

13. Gasgangarene bacillus is

Correct : B. Obligate anaerobe

14. Coagulase test is used for

Correct : B. Staphylococcus

15. HIV is belonging to

Correct : A. Retro Viridae

16. Special feature of Retro viruses

Correct : C. Both a & b

17. AIDS virus is

Correct : C. Retro virus

18. AIDS is caused by

Correct : D. All

19. Which of the following organisms is most commonly associated with AIDS pneumonia?

Correct : D. Mycobacterium tuberculosis

20. Sero conservation in HIV infection takes place in

Correct : C. 9 weeks

21. Following is the marker of HIV infection in blood:

Correct : A. Reverse transcriptase

22. Which of the following is the most specific in diagnosis of AIDS?

Correct : B. Western blot

23. The interval period between HIV infection and appearance of antibodies in serum is called

Correct : C. Window period

24. Screening test for AIDS is

Correct : B. ELISA test

25. Confirmatory test for AIDS is

Correct : A. Western blot test

26. The most common infection in AIDS is

Correct : C. Pnemocystis carnii

27. During AIDS, HIV infects

Correct : B. CD4 lymphocytes

28. Lab diagnosis of Leishmaniasis is done by

Correct : D. All of these

29. Those fungi which do not have a sexual stage are classified as

Correct : D. Fungi imperfecti

30. Tinea capitis is

Correct : C. Ring worm of non-hairy skin of body

31. Diagnosis of bacterial disease can be made by

Correct : C. Both a and b

32. Staphylococcus aureus are characterized by

Correct : C. Strains are catalase positive

33. Cholera occurs in _______ form

Correct : D. all

34. Endemic typhus is caused by

Correct : A. R.mooseri

35. A man is usually infected for tick typhus by –

Correct : C. Inhaling infected dust

36. In Gram positive bacteria, ratio of RNA to DNA is

Correct : A. 8 : 1

37. Ziehl – Neelson stain is a ______

Correct : C. Differential stain

38. Wet mount slide preparations are used in microbiology as they allow to see

Correct : D. All of these

39. Freeze-etch particles (used in preparing cell for electron microscopy) can be located in the

Correct : C. Cell membrane

40. The properties common to Gram positive and negative cell walls are

Correct : D. Greater resistance to drying than vegetative cell.

41. The main difference in true bacteria and mycoplasma is that it does not posses –

Correct : B. Cell wall

42. The organism responsible for retarding penetration of host cell by an inhibitor of ATP synthesis.

Correct : B. Rickettsia rickettsii

43. Mycoplasmas differ from Chalamy-diae in that, it

Correct : B. lack of atrue bacterial cell wall

44. Fungal disease in human is caused by –

Correct : D. All of these

45. A polysaccharide capsule is present on cryptococci which –

Correct : A. Inhibits phagocytosis

46. The largest protozoa is –

Correct : A. Balantidium coli

47. Premunition is particularly seen in –

Correct : C. Plasmodium

48. Which of the following vaccine contains attenuated form of bacteria?

Correct : A. BCG

49. The bacteria, which is motile at 22oC but non-motile at 37oC is

Correct : D. Cell fusion

50. Techoic acid is –

Correct : A. Found in the walls of Gram positive bacteria

51. One flagelium at one end of the organ is called –

Correct : A. Monotrichate

52. What is the function of bacterial capsule?

Correct : C. Both a and b

53. Which of the following is the charachteristic of bacterial spore?

Correct : D. All of these

54. Which of the following are acid fast structures?

Correct : D. All of these

55. All of the following are acid fast structures except

Correct : A. Clostridium

56. All of the following are energy source of bacteria except

Correct : C. Absorption of heat

57. Identify the obligate anaerobes

Correct : C. Cl. tetani

58. Streptococci which are destroyed at 60°C for 30 minutes

Correct : D. All of these

59. Toxins or enzymes which are not produced by streptococcus pyrogens

Correct : B. Phosphate

60. Cholera red reaction is identified by

Correct : A. Sulphuric acid

61. Diagnosis of carrier of salmonella typhi may be shown by

Correct : D. All of these

62. Daisy head colony is associated with

Correct : B. C.diphtheriae

63. Neil mooseri reaction is related to

Correct : A. Rickettsiae

64. All of the following are DNA viruses except –

Correct : B. Paramyxo virus

65. The dengue fever virus is –

Correct : A. Arbo viru

66. Dengue fever is caused by –

Correct : B. Virus

67. Which of the following characters are related to viruses?

Correct : D. Insensitive to interferon

68. Main causative organism of chiken pox is

Correct : D. None of these

69. Rickesia are stained with

Correct : C. Both a and b

70. The medium used in membrane filter technique was

Correct : B. EMR-Vp medium

71. Lysol is a

Correct : B. Disinfectant

72. Which of the following is a neutral stain?

Correct : C. Neutral red

73. Peptone water medium is an example for

Correct : B. Semisynthetic medium

74. The method in which the cells are frozen dehydrated is called

Correct : D. Lypophilization

75. The techn ique used to avo id all microorganisms is accomplished by

Correct : A. Sterlization

76. Thermal death time is

Correct : B. Temperature that kills all cells in a given time

77. A culture medium the exact composition of which is not known was called as

Correct : A. Simple

78. Elek’s gel diffusion test is used for the detection of

Correct : C. Diophtheria toxin

79. Temperature required for pasteurization is

Correct : B. Below 100oC

80. Separation of a single bacterial colony is calle

Correct : A. Isolation

81. Wh ich of the fo l low ing is ion iz ing radiation?

Correct : C. γ-rays

82. Wh ich of the fo l low ing induces dimerisation of thymine?

Correct : B. U.V. rays

83. When food material are preserved at a temperature just above freezing temperature, the process is called.

Correct : C. Chilling

84. Wh ich of the fo l low ing method of sterilization has no effect on spores?

Correct : A. Drying

85. Treponema pa l l idum can be best indentified using

Correct : C. Dark field microscope

86. Autoclaving is carried at

Correct : C. 120oC

87. Temperature in pasteurization is

Correct : A. 62.8oC

88. The bacterial culture prepared by pure culture method is

Correct : A. Inoculum

89. Algae are rich in

Correct : D. All of these

90. L-Lysine is produced from

Correct : A. Corynebacterium glutamicum

91. The orderly increase in the quantity of all of the cellular components is known as

Correct : B. Growth

92. Theobacillus thio oxidans grow at pH

Correct : B. 1.0

93. Slow freezing requires the conditions

Correct : C. – 15oC to 3 to 72 hrs.

94. Discontinuous heating is called

Correct : D. Tindalisation

95. Isolation is

Correct : C. Separation of a single colony

96. The condition required for autoclave

Correct : C. 150oC temp.for 1 hr.

97. Lysozyme is effective against

Correct : B. Gram positive bacteria

98. Blood agar medium is

Correct : B. Enriched medium

99. Infrared radiation is a method of sterilization by

Correct : D. Mechanical method

100. Lyophilization means

Correct : B. Freeze-drying