Virus infected cell is killed by:
A. Interferons
B. Macrophages
C. Neutrophils
D. Autolysis
IL-1 and TNF a during inflammation are secreted by:
A. Plasma cells
B. Activated macrophages
C. Lymphocytes
D. Platelet
The protective effects breast milk are known to be associated with:
A. IgM antibodies
B. Lysozyme
C. Mast cells
D. IgA antibodies
The best skin disinfectant is:
A. Chlorhexdine
B. Alcohol
C. Savlon
D. None of the above
Culture medium for corynebacterium diphtheria:
A. Loefflers serum slope
B. Mc Conkey
C. Saboraud agar
D. Lowenstein Jensen medium
Dorset’s egg medium is used for cultivation of:
A. Staphylococcus
B. Streptococcus
C. Gonococcus
D. Mycobacterium
The mechanism of genetic transfer where a phage serves as a vehicle is:
A. Transformation
B. Translation
C. Conjugation
D. Lysogeny
Mesophilic organisms are those that grow best at temperature of:
A. -20°C to -7°C
B. -7°C to + 20°C
C. 25°C to 40°C
D. 55°C to 80°C
Spores are disinfected by:
A. Glutaraldehyde
B. Betapropiolactone
C. Formaldehyde
D. Hexachlorophen
E. Both A & C
Most of the drug resistances occurs due to:
A. Transduction
B. Transformation
C. Mutation
D. conjugation
