By using phase contrast microscope_______________?
(A) Internal structures are differentiated in living cells
(B) Internal structures are differentiated in dead cells
(C) Internal metabolic activities can be observed
(D) External capsule formation can be observed
Blood agar is________________?
(A) Simple media
(B) Transport media
(C) Enriched media
(D) Differential media
The difference between sterilization and disinfection is that_______________?
(A) Disinfection kills all spores but sterilization does not
(B) Sterilization kills all spores but disinfection does not
(C) Sterilization involves chemicals and disinfection involves physical methods
(D) Sterilization is easier to achieve
The component that sensitizes bacteria and virus to UV irradiation_______________?
(A) Lipids
(B) Carbohydrates
(C) Inorganic salts
(D) Nucleic acids
Disinfection of the rooms can be done by using_______________?
(A) 20% phenol
(B) High efficiency particle arrestors
(C) 40% formaldehyde vapour
(D) Chlorine gas
The term epitope refers to________________?
(A) complete antigen molecule
(B) Hapten
(C) Immunogen
(D) Smallest antigenic determinant
Cold sterilization refers to the process of sterilization by use of____________________?
(A) Ultra violet rays
(B) Ultrasonic vibrations
(C) Infrared rays
(D) Gamma rays
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
Which of the following organisms does NOT react with gram’s stain ?
(A) Actinomyces israelii
(B) Candida albicans
(C) Mycobacterium tuberculosis
(D) Streptococcus mutan
Complement factor through which common pathway begins___________________?
(A) C3
(B) C5
(C) C2
(D) Protein B