microbiology MCQs – Page 23

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

microbiology Mcqs

441. Bacteria reproduce mainly by______________?
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A. Sporing

B. Budding

C. Binary fission

D. Bacterial components produced by host cells

442. Mycobacterium tuberculosis is differentiated from other atypical mycobacteria by______________?
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A. None of the above

B. Niacin test

C. Pas staining

D. AFB staining

443. Cleavage of IgG molecule by Papin gives rise to:One Fc fragment and two Fab fragments_______________?
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A. Two Fc fragment and one Fab fragment

B. One Fc fragment and two Fab fragments

C. Two Fc fragments and two Fab fragments

D. One Fc fragment and four Fab fragments

444. Inactivated microorganisms are used in the manufacture of which of the following________________?
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A. Sabins oral vaccine

B. All of the above

C. Tetanus toxoid

D. Salk vaccine

445. One of the following statement about statements about sterilization is not true_______________?
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A. Flash pasteurization of milk ? 72 C for 15 seconds, followed quickly by rapid cooling to 13C for lower

B. Liquid paraffin ? Dry heat

C. Glass syringes ? Boiling at 169C for 60 min

D. Vaccines ? Ethylene oxide

446. The exact part of the antigen that reacts with the immune system is called as_____________?
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A. Idiotope

B. Clone

C. Epitope

D. Paratope

447. Secretory piece of IgA is synthesized in______________?
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A. Lymph nodes

B. Mucosal epithelium

C. B-cells

D. T-cells

448. Example of immune complex hyper-sensitivity reaction is______________?
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A. Transfusion reaction

B. Serum sickness

C. Atopic allergy

D. Contact dermatitis

449. Bacterial spores are destroyed by_______________?
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A. Disinfection by hypochlorite solution

B. Boiling at 100C

C. Autoclave

D. Pasteurisation

450. Streptococcus is classified based on__________________?
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A. Bile Solubility

B. Cultural characteristics

C. M Protein

D. Cell wall carbohydrate

451. Erysipelas is caused by________________?
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A. Pneumococci

B. Group A steptococci

C. Group B staphylococci

D. Gonococci

452. The most frequently encountered clostridial species in gas gangrene is______________?
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A. Clostridium tetani

B. Clostridium botulinum

C. Clostridium difficile

D. Clostridium welchii

453. About Psedomonas. All are true except________________?
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A. Strick aerobes

B. Most common organism is burn patient

C. Can grow in disinfectants in hospital

D. Infection is mostly due to endogenous source

454. The optimal time and temperature required for sterilization in an autoclave is___________________?
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A. 121C 15 mts. x 15 lbs pr.

B. 121F x 15 sec. x 15 lbs pr.

C. 140C x 2 hrs. x 10 lbs pr.

D. 121F x 15 mts. x 15 lbs pr.

455. All of the following are true of streptococcus except_____________?
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A. Most common is animals

B. Shows adherence to dental enamel

C. Its group of lactic acid production bacteria

D. Most common in humans

456. The best sterilization method for a hand-piece is________________?
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A. All of the above

B. Ethylene oxide gas

C. dry heat

D. chemical vapour

457. Vibrio cholera was discovered by_________________?
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A. Medintoff

B. Koch

C. Virchow

D. John snow

458. Thumb print appearance in culture film smear is seen______________?
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A. Brucella species

B. Clostridium weichii

C. Bordetelia pertussis

D. Bacillus anthracis

459. True about VDRL test________________?
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A. Best followed for drug therapy

B. Slide flocculation test

C. Non Specific

D. All of the above

460. The urine sample of a patient has been sent to the laboratory to look for Leptospira. The specimen is to be screened by use of the__________________?
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A. Inverted microscope

B. Electron microscope

C. Scanning microscope

D. Dark ground microscope

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