A. Tissue culture
B. Embryonated eggs
C. Animals
D. Chemically defined media
✅ The correct answer is option Chemically defined media.
Microbiology MCQs
272. Which of the following is NOT a live attenuated vaccine ?
A. Tuberculosis (BCG)
B. Typhoid
C. Varicella Zoster virus
D. Cholera
✅ The correct answer is option Cholera.
273. Interferon interferes with replication of virus at the time of_____________?
A. Protein synthesis
B. DNA/RNA replication
C. When virus enters the cell
D. Uncoating of the virus proteins capsule
✅ The correct answer is option Protein synthesis.
274. Diphtheria is pathogenic only when infected with______________?
A. Beta phage
B. Alfa phage
C. Lambda K12
D. Delta Phage
✅ The correct answer is option Beta phage.
275. For uniform staining reaction, morphology and biochemical activity it is advisable to study bacterial cultures during the_____________?
A. Lag phase
B. Death phase
C. Stationary phase
D. Logarithmic phase
✅ The correct answer is option Logarithmic phase.
276. EBV causes all except_________________?
A. Carcinoma of nasopharynx
B. Papilloma
C. Infectious mononucleosis
D. Burkitt’s lymphoma
✅ The correct answer is option Papilloma.
277. All are true about Entamoeba histolytica except________________?
A. Cysts are 8 nucleated
B. Cysts are 4 nucleated
C. Trophozoites colonise in the colon
D. The chromatid bodies are stained by iodides
✅ The correct answer is option Cysts are 8 nucleated.
278. In a patient with typhoid, diagnosis after 15 days of onset of fever is best done by_____________?
A. Blood culture
B. Widal test
C. Stool culture
D. Urine culture
✅ The correct answer is option Widal test.
279. Techoic acid is present in_____________?
A. Cell wall of Gram positive organisms
B. Cell wall of Gram negative organisms
C. Cytoplasm of Gram positive organisms
D. Cytoplasm of Gram negative organisms
✅ The correct answer is option Cell wall of Gram positive organisms.
280. Normal ratio of CD4 (T4) : CD8 (T8) is_________________?
A. 2:1
B. 1:2
C. 3:1
D. 1:3
✅ The correct answer is option 2:1.