TOP Microbiology MCQS
All Questions for: TOP Microbiology MCQS
Question 251: All of the following organisms are known to survive intracellularly except_____________?
- A Streptococcus pyogenes
- B Legionella pneumophila
- C Neisseria meningitides
- D Salmonella typhi
Explanation: The correct answer to the question is: Streptococcus pyogenes
Question 252: The best sterilization method for a hand-piece is________________?
- A All of the above
- B chemical vapour
- C Ethylene oxide gas
- D dry heat
Explanation: The correct answer to the question is: Ethylene oxide gas
Question 253: Salivary protein, which prevents transmission of human immunodeficiency virus via saliva, is____________?
- A Sialoperoxidase
- B Salivary leukocyte proteinase inhibitor
- C Secretory IgA
- D Histidine rich proteins
Explanation: The correct answer to the question is: Salivary leukocyte proteinase inhibitor
Question 254: Sleeping sickness is caused by_______________?
- A Sand fly
- B House fly
- C Reduvid bug
- D Tick
Explanation: The correct answer to the question is: Reduvid bug
Question 255: The inflammatory type of tinea capitis with superadded secondary bacterial infection leading to a painful, circumscribed, boggy, and indurated lesion, is called_____________?
- A Kerison
- B Tenia incognito
- C Alopecia areata
- D Pilomatrixoma
Explanation: The correct answer to the question is: Kerison
Question 256: Steam under pressure in used in ________ sterilization?
- A Pasteurization
- B Autoclave
- C hot air oven
- D Kochs sterilizer
Explanation: The correct answer to the question is: Autoclave
Question 257: The small nonparticulate protein leading to enhanced replication of HBV as well as HIV is______________?
- A HBc Ag
- B Hbe Ag
- C HBs Ag
- D HBx Ag
Explanation: The correct answer to the question is: HBx Ag
Question 258: T cells multiplication is stimulated by_______________?
- A Phytohaemagglutinin
- B Macrolin
- C Heat
- D Bovine serum
Explanation: The correct answer to the question is: Phytohaemagglutinin
Question 259: Bacteria reproduce mainly by______________?
- A Budding
- B Bacterial components produced by host cells
- C Binary fission
- D Sporing
Explanation: The correct answer to the question is: Binary fission
Question 260: The immediate type of hypersensitivity in which histamine doses not play a major role is______________?
- A Arthus reaction
- B Anaphylaxis
- C Asthma
- D Urticaria
Explanation: The correct answer to the question is: Arthus reaction
Question 261: Robertsons cooked meat medium is best suited for cultivation of_______________?
- A S. epidermidis
- B Clostridia
- C Mycobacterium
- D Choleria
Explanation: The correct answer to the question is: Clostridia
Question 262: A rise in the anti-HBc immunoglobulin in a patient indicates________________?
- A Acute infection
- B Carrier state
- C Convalescence
- D Prodromal phase
Explanation: The correct answer to the question is: Acute infection
Question 263: Which of the following organisms does NOT react with gram
- A Mycobacterium tuberculosis
- B Streptococcus mutan
- C Candida albicans
- D Actinomyces israelii
Explanation: The correct answer to the question is: Mycobacterium tuberculosis
Question 264: Type I hypersensitivity is mediated by which of the following immunoglobulins ?
- A IgE
- B IgA
- C IgM
- D IgG
Explanation: The correct answer to the question is: IgE
Question 265: Disinfection of the rooms can be done by using_______________?
- A Chlorine gas
- B 40% formaldehyde vapour
- C 20% phenol
- D High efficiency particle arrestors
Explanation: The correct answer to the question is: 40% formaldehyde vapour
Question 266: Negative staining is used to demonstrate________________?
- A Bacterial fimbriae
- B Bacterial capsule
- C Bacterial Flagella
- D Bacterial spore
Explanation: The correct answer to the question is: Bacterial fimbriae
Question 267: Which is not true about vibrio cholera_________________?
- A Grows on simple media
- B Man is the only natural host
- C Cannot survive in extracellular environment
- D It is non-halophilic
Explanation: The correct answer to the question is: Cannot survive in extracellular environment
Question 268: Group A carbohydrate of Str. pyogenes cross reacts with human_________________?
- A Synovial fluid
- B Vascular intima
- C Cardiac valves
- D Myocardium
Explanation: The correct answer to the question is: Cardiac valves
Question 269: Pneumococus can be differentiated from streptococcus by________________?
- A Type of hemolysis
- B Growth characteristics
- C Bile solubility
- D Gram staining
Explanation: The correct answer to the question is: Bile solubility
Question 270: Phage conversion is required for________________?
- A Gonorrhoea
- B Diptheria
- C All o f the above
- D Tularemia
Explanation: The correct answer to the question is: Diptheria
Question 271: parasitic inflammation would show predominantly____________________?
- A Neutrophilis
- B Eosinophils
- C Basophils
- D Lymphocytes
Explanation: The correct answer to the question is: Eosinophils
Question 272: Pseudohphae are seen in____________?
- A Candida albicans
- B Aspergillus
- C Osporium
- D Alternaria
Explanation: The correct answer to the question is: Candida albicans
Question 273: Which of the following is not transmitted by lice ?
- A Trench fever
- B Epidemic typhus
- C Relapsing fever
- D Q fever
Explanation: The correct answer to the question is: Q fever
Question 274: The causative organism of syphilis is___________?
- A Treponema pallidum
- B Leptospira interrogans
- C Chalamydia trachomatis
- D Borrelia burgolorferi
Explanation: The correct answer to the question is: Treponema pallidum
Question 275: Transmission of all of the following intestinal parasites takes place by the feco-oral route except______________?
- A Giardia lambia
- B Strongyloides
- C Ascaris lumbriocoides
- D Entamoeba
Explanation: The correct answer to the question is: Strongyloides
Question 276: Toxoids are_________________?
- A non-antigenic and toxic
- B non-antigenic and non-toxic
- C antigenic and toxic
- D antigenic and non-toxic
Explanation: The correct answer to the question is: antigenic and non-toxic
Question 277: Portion of immunoglobulin molecule with molecular weight to 50000_________________?
- A Secretory piece
- B H chain
- C L chain
- D J piece
Explanation: The correct answer to the question is: H chain
Question 278: IL-1 is produced by_________________?
- A Monocytes
- B Helper T cells
- C Helper B cells
- D Macrophages
Explanation: The correct answer to the question is: Macrophages
Question 279: In a patient with typhoid, diagnosis after 15 days of onset of fever is best done by_____________?
- A Widal test
- B Stool culture
- C Urine culture
- D Blood culture
Explanation: The correct answer to the question is: Widal test
Question 280: About N. gonorrhoea, all are true except__________________?
- A Most common cause of urethritis is male
- B Found exclusively in human beings.
- C Wide spread axoregnic stains cause disseminated gonococcal infection
- D All stains are highly susceptible to penicillin
Explanation: The correct answer to the question is: All stains are highly susceptible to penicillin
Question 281: Pigs are important source of_____________?
- A Japanese encephalitis
- B Kuru
- C Rabies
- D Yellow fever
Explanation: The correct answer to the question is: Japanese encephalitis
Question 282: 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 ?
- A Optochin sensitivity
- B Bacitracin sensitivity
- C Bile solubility
- D Cataslase positive
Explanation: The correct answer to the question is: Bacitracin sensitivity
Question 283: Organ of locomotion in bacteria is________________?
- A Capsule
- B Flagella
- C Fimbria
- D Cell wall
Explanation: The correct answer to the question is: Flagella
Question 284: All of the following lab tests can be used to distinguish streptococcus mutans from other oral streptococci, except______________?
- A Production of intracellular and extracellular adherent polysacharide
- B Fermentation of mannitol and sorbital
- C Gram staining
- D Colony morphology on saliva agar
Explanation: The correct answer to the question is: Gram staining
Question 285: Medusa lock appearance in X ray is seen in______________?
- A Ascariasis
- B Hood worm
- C Ascariasis and tapeworm
- D Tapeworm
Explanation: The correct answer to the question is: Ascariasis
Question 286: Bacteria with tuft of flagella at one end are called_______________?
- A Monotrichate
- B Lophotrichate
- C Peritrichate
- D Bipolar
Explanation: The correct answer to the question is: Lophotrichate
Question 287: Certain viruses have been isolated in crytalline form and have been found to be_____________?
- A Nucleoproteins
- B Phospholipids
- C Scleroproteins
- D Nucleotides
Explanation: The correct answer to the question is: Nucleoproteins
Question 288: Fungal infection of human beings is called as_____________?
- A Mycosis
- B Mucorsis
- C Micromia
- D Fungosis
Explanation: The correct answer to the question is: Mycosis
Question 289: Pseudomonas aeruginosa_________________?
- A Produces heat stable enterotoxin
- B Cannot be destroyed at 55 degree at 1 hr.
- C Causes Shangai fever
- D Does not produce any pigment
Explanation: The correct answer to the question is: Causes Shangai fever
Question 290: The world german measles is applied for_____________?
- A Herpetic ginglvostomatitis
- B Rubeola
- C Herpes simplex
- D Rubella
Explanation: The correct answer to the question is: Rubella
Question 291: Which of the following provides best gurantee for sterlization in the heat sterilizer ?
- A Using chemical indicator strip or pouch
- B Using a bacterial spore test
- C Recording a temperature/ pressure readings from sterilizer guage
- D Determining the ability of a sterilizer to kill the hepatitis B virus
Explanation: The correct answer to the question is: Using a bacterial spore test
Question 292: Active artificial immunization is induced by the administration of all of the following EXCEPT______________?
- A Antitoxins
- B Toxoids
- C Bacterial products
- D Vaccines
Explanation: The correct answer to the question is: Antitoxins
Question 293: Plaque test is used routinely in virology lab
- A Identification of viral disease
- B To prepare vaccines
- C To separate specific clone of virus
- D To maintain certain viral culture
Explanation: The correct answer to the question is: Identification of viral disease
Question 294: The commonest method of detection of diptheria carriers is_______________?
- A Schick test
- B Dick test
- C Casoni
- D Charles
Explanation: The correct answer to the question is: Schick test
Question 295: Most common tumor associated with AIDS is______________?
- A Kaposi
- B Ewing
- C Melanoma
- D Carcinoma
Explanation: The correct answer to the question is: Kaposi
Question 296: Which of the following is a RNA virus ?
- A Herpes Virus
- B Adeno virus
- C Measles virus
- D Papavo virus
Explanation: The correct answer to the question is: Measles virus
Question 297: A 6 year old boy comes with abdominal pain, vomiting after consuming mild products within 6 hours. The most likely organism responsible is______________?
- A Staph. aureus
- B Salmonella
- C Clostridium botulinum
- D B.Cereus
Explanation: The correct answer to the question is: Staph. aureus
Question 298: The medium of choice for growing most fungi is_______________?
- A Tissue culture
- B Sabouraud
- C Thioglycollate medium
- D Blood agar
Explanation: The correct answer to the question is: Sabouraud
Question 299: Hydatid cyst is__________________?
- A Viral
- B Parasitic in nature
- C Congenital
- D Fungal
Explanation: The correct answer to the question is: Parasitic in nature
Question 300: Phagocytosis enhanced by coating the surface of antigen is called______________?
- A Chemotaxis
- B CFT
- C De coding
- D Opsonisation
Explanation: The correct answer to the question is: Opsonisation