201. Which of the following antibacterial substance is present in eggs and saliva ?
A. Lysozyme
B. Secretozyme
C. Albumin
D. Isozyme
✅ The correct answer is option Lysozyme.
Microbiology MCQs
202. Bacterial species which is protective or beneficial to the host is_______________?
A. Streptococcus sanguis
B. Porphyromonas gingivalis
C. Treponema denticola
D. Spirochetes
✅ The correct answer is option Streptococcus sanguis.
203. The spirochete which is associated with fusospirochetosis is______________?
A. Treponema pallidum
B. Treponjema pertenue
C. Borrelia burgdorferi
D. Borrelia vincenti
✅ The correct answer is option Borrelia vincenti.
204. All are not true for cultivation of anaerobic organisms except_______________?
A. Incubator
B. anaerobic jar
C. Refrigerator
D. Centrifuge
✅ The correct answer is option anaerobic jar.
205. Medusa lock appearance in X ray is seen in______________?
A. Ascariasis
B. Tapeworm
C. Hood worm
D. Ascariasis and tapeworm
✅ The correct answer is option Ascariasis.
206. Streptococcus is classified based on__________________?
A. M Protein
B. Cultural characteristics
C. Bile Solubility
D. Cell wall carbohydrate
✅ The correct answer is option Cell wall carbohydrate.
207. Fungus capable to forming fungal ball is ________________?
A. Penicillium
B. Aspergillus
C. Mucor
D. Rhizopus
✅ The correct answer is option Aspergillus.
208. The key cell types involved in the acquired immunity include all EXCEPT________________?
A. B lymphocytes
B. Erythrocytes
C. T lymphocytes
D. Antigen presenting cells (APC
✅ The correct answer is option Erythrocytes.
209. Lepromin test is useful for________________?
A. Diagnosis
B. Prognosis
C. Treatment plan
D. Epidemiology
✅ The correct answer is option Prognosis.
210. The Window period in HIV infection means______________?
A. The time lapse between the infection and detection of viral antibodies
B. The time lapse between the infection and development of AIDS
C. The time lapse between obtaining the sample and detection of virus in the lab
D. None of the above
✅ The correct answer is option The time lapse between the infection and detection of viral antibodies.