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The component that sensitizes bacteria and virus to UV irradiation_______________?

  • (A)  Lipids
  • (B)  Carbohydrates
  • (C)  Inorganic salts
  • (D)  Nucleic acids
Submitted By :Ali Uppal


Disinfection of the rooms can be done by using_______________?

  • (A)  20% phenol
  • (B)  High efficiency particle arrestors
  • (C)  40% formaldehyde vapour
  • (D)  Chlorine gas
Submitted By :Ali Uppal


The term epitope refers to________________?

  • (A)  complete antigen molecule
  • (B)  Hapten
  • (C)  Immunogen
  • (D)  Smallest antigenic determinant
Submitted By :Ali Uppal


Cold sterilization refers to the process of sterilization by use of____________________?

  • (A)  Ultra violet rays
  • (B)  Ultrasonic vibrations
  • (C)  Infrared rays
  • (D)  Gamma rays
Submitted By :Ali Uppal


Phase contrast microscopy is based on principle of__________________?

  • (A)  Different refractive indices of object
  • (B)  Different reflective indices of object
  • (C)  Light scattering
  • (D)  Light attenuation
Submitted By :Ali Uppal


Which of the following organisms does NOT react with gram’s stain ?

  • (A)  Actinomyces israelii
  • (B)  Candida albicans
  • (C)  Mycobacterium tuberculosis
  • (D)  Streptococcus mutan
Submitted By :Ali Uppal


Submitted By :Ali Uppal


The key cell types involved in the acquired immunity include all EXCEPT________________?

  • (A)  B lymphocytes
  • (B)  Erythrocytes
  • (C)  T lymphocytes
  • (D)  Antigen presenting cells (APC
Submitted By :Ali Uppal


Sterilization is a process in which_________________?

  • (A)  Kill all pathogenic micro-organisms
  • (B)  Kill all non-pathogenic micro-organisms in the environment
  • (C)  Deactivate all pathogens not spores
  • (D)  Deactivate all spores and dill pathogenic organism
Submitted By :Ali Uppal


Immunoglobulin crossing placenta is_________________?

  • (A)  Ig M
  • (B)  Ig A
  • (C)  Ig G
  • (D)  Ig D
Submitted By :Ali Uppal