Microbiology MCQs

1. The most primitive mode of gene transfer occurs by____________?

A. Transduction

B. Translation

C. Cell fusion

D. Conjugation

✅ The correct answer is option Conjugation.

2. Toxic shock syndrome is due to the following virulence factor_____________?

A. M protein

B. Pyrogenic exotoxin

C. Streptolysin 0

D. Carbohydrate cell wall

✅ The correct answer is option Pyrogenic exotoxin.

3. Staphylococcal toxic shock syndrome (SSS syndrome) is due to______________?

A. Enterotoxin A

B. Enterotoxin B

C. Enterotoxin D

D. Enterotoxin F

✅ The correct answer is option Enterotoxin F.

4. Noguchi’s medium is used for________________?

A. Bordetella

B. Brucella

C. Borrelia

D. None of the above

✅ The correct answer is option Borrelia.

5. Dorset’s egg medium is used for cultivation of______________?

A. Staphylococcus

B. Streptococcus

C. Gonococcus

D. Mycobacterium

✅ The correct answer is option Mycobacterium.

6. Staphylococcus does not causes_______________?

A. Osteomyelitis

B. Abscess

C. Scarlet fever

D. Pneumonia

✅ The correct answer is option Scarlet fever.

7. Investigation of choice for invasive amoebiasis is________________?

A. Indirect hemagglutination

B. ELISA

C. Counter immune electroporesis

D. Microscopy

✅ The correct answer is option ELISA.

8. Fungal infection of human beings is called as_____________?

A. Mucorsis

B. Mycosis

C. Fungosis

D. Micromia

✅ The correct answer is option Mycosis.

9. Australian antigen is_______________?

A. HB Ag

B. HBs AG

C. HBV

D. None of the above

✅ The correct answer is option HBs AG.

10. Serological study for prevalence of Hepatitis B is best done by______________?

A. Surface antigen

B. Surface antibody

C. Core antigen

D. Core antibody

✅ The correct answer is option Surface antigen.