A. Salk vaccine
B. Tetanus toxoid
C. Sabin’s oral vaccine
D. All of the above
✅ The correct answer is option Salk vaccine.
Microbiology MCQs
212. Immunoglobulins ar secreted by______________?
A. Macrophages
B. Plasma cells
C. T-cells
D. Neutrophils
✅ The correct answer is option Plasma cells.
213. Actinomycetes is______________?
A. Gram positive bacteria
B. Gram negative bacteria
C. Fungus
D. A yeast like form
✅ The correct answer is option Gram positive bacteria.
214. Thumb print appearance in culture film smear is seen______________?
A. 1. Bacillus anthracis
B. 2. Brucella species
C. 3. Bordetelia pertussis
D. 4. Clostridium weichii
✅ The correct answer is option 3. Bordetelia pertussis.
215. 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
✅ The correct answer is option Different refractive indices of object.
216. The predominant immunoglobulin in saliva is_______________?
A. IgA
B. IgD
C. IgE
D. IgG
✅ The correct answer is option IgA.
217. 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
✅ The correct answer is option 25°C to 40°C.
218. Drumstick appearance is seen in______________?
A. Cl. tetani
B. Cl. tetanomorphum
C. Cl. sphenoids
D. All of the above
✅ The correct answer is option Cl. tetani.
219. Dental Plaque adheres to tooth surface by________________?
A. Dextran
B. Epithelial cells
C. Bacteria
D. Sucrose
✅ The correct answer is option Dextran.
220. Growth factor needed for Salmonella_________________?
A. Tryptophan
B. Niacin
C. B-12
D. Citrate
✅ The correct answer is option Tryptophan.