microbiology MCQs – Page 17

Practise focused microbiology questions with marked answers for exam preparation and subject revision.

microbiology Mcqs
321. Smith noguchis media is used for_______________?
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A. Spirochetes

B. Klebsiella

C. Salmonella

D. Bacillus

322. Group A B-hemolytic streptococcal infection of the pharynx may be followed in some by_____________?
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A. Syphilis

B. Typhoid fever

C. Rheumatic fever

D. Diphtheria

323. Nagglers reaction detects________________?
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A. Lecithinase

B. None of the above

C. Coagulase

D. Hyaluronidase

324. Bacteria with tuft of flagella at one end are called_______________?
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A. Lophotrichate

B. Bipolar

C. Peritrichate

D. Monotrichate

325. The bacterial cell wall has all of the following properties except______________?
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A. It is the structure principally responsible for the reaction of gram staining

B. It consists of a mixed polymer called peptidoglycon

C. It contains D-isomers of amino acids

D. It is a unique flexible plastic structure
326. Salmonella typhi can be isolated at different times from______________?
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A. Urine

B. Blood

C. All of the above

D. Feaces

327. Type IV hypersensitivity reaction is mediated by which of the following________________?
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A. B-cells

B. Active T cells

C. NK cells

D. Plasma cells

328. A child presents with infective skin lesions of the leg. Culture was done which showed gram positive cocci in chains and haemolytic colonies. Which of the following tests will best identify the organism ?
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A. Bile solubility

B. Optochin sensitivity

C. Bacitracin sensitivity

D. Cataslase positive

329. CD4 cells recognize the antigens in association with_____________?
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A. B-cell receptor

B. MHC I

C. MHC III

D. MHC II
330. The most primitive mode of gene transfer occurs by____________?
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A. Transduction

B. Cell fusion

C. Translation

D. Conjugation
331. The facultative anaerobic bacteria are those who are_______________?
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A. Able to grow in the presence of absence of oxygen

B. Unable to grow in the absence of oxygen

C. Unable to grow in the presence of oxygen

D. Able to grow in the presence of carbon dioxide

332. Which of the following is a live vaccine_____________?
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A. Hepatitis

B. 17 D

C. Salk

D. HDCV
333. Graft versus host reaction is caused by_________________?
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A. T-lymphocytes

B. Monocytes

C. B-Lymphocytes

D. Leukocytes

334. Each of the following viruses possesses an outer lipoprotein envelope except_____________?
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A. Influenza Virus

B. Papilloma Virus

C. Varicella Zoster Virus

D. Human immunodeficiency virus

335. Salivary peroxidise system is known to be effective agianst________________?
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A. Lactobacillus acidophilus

B. Actinomyces viscosus

C. Streptococcus mutans

D. Veilonella parvula

336. The most common pathogens responsible for nosocomial pneumonias in the ICU are______________?
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A. Mycoplasma

B. Virus infections

C. Gram negative organisms

D. Gram positive organisms

337. Pseudomonas aeruginosa_________________?
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A. Produces heat stable enterotoxin

B. Causes Shangai fever

C. Cannot be destroyed at 55 degree at 1 hr.

D. Does not produce any pigment

338. Culture medium used for Bordatella pertussis is_________________?
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A. Wilson Blair medium

B. Bordet Gengou medium

C. Robertson cooked meat medium

D. Bile broth

339. Pathogenesis of diphtheria is attributed to__________________?
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A. Invasion

B. Capsule

C. Exotoxin

D. Endotoxin

340. Negative staining is used to demonstrate________________?
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A. Bacterial capsule

B. Bacterial spore

C. Bacterial fimbriae

D. Bacterial Flagella