Questions: TOP Microbiology MCQS

Question 151: The virus which causes Aplastic anemia in chronic hemolytic disease is_______________?

A Hepatitis
B EB virus
C Adeno
D Parvo virus

Explanation: The correct answer to the question is: Parvo virus

Question 152: Most antibodies are produced in the________________?

A Brain and the meninges
B Spleen and the lymph nodes
C Thymus and the appendix
D Heart and the liver

Explanation: The correct answer to the question is: Spleen and the lymph nodes

Question 153: Post streptococcal acute glomerulo nephritis is an example of________________?

A Type II hypersensitivity
B Type IV hypersensitivity
C Type I hypersensitivity
D Type III hypersensitivity

Explanation: The correct answer to the question is: Type III hypersensitivity

Question 154: Hepatitis C virus belongs to which one of the following virus groups ?

A Flavi viruses
B Picorna viruses
C Hepadana viruses
D Herpes viruses

Explanation: The correct answer to the question is: Flavi viruses

Question 155: Phase contrast microscopy is based on principle of__________________?

A Light scattering
B Light attenuation
C Different reflective indices of object
D Different refractive indices of object

Explanation: The correct answer to the question is: Different refractive indices of object

Question 156: The medium of choice for culturing yeast from of dimorphic fungi is_________________?

A Sabouraud
B Sabouraud
C Any medium incubated at 35-37
D Brain

Explanation: The correct answer to the question is: Sabouraud

Question 157: The diagnosis of gonorrhea is established by_____________?

A All of the above tests
B Compliment fixation tests
C Haemagglutination tests
D Pili agglutination tests

Explanation: The correct answer to the question is: All of the above tests

Question 158: Highest incidence of anemia in the tropics is due to______________?

A Thread worm
B Guinea worm
C Hook worm
D Ascaris

Explanation: The correct answer to the question is: Hook worm

Question 159: Candida albicans causes all of the following except______________?

A Mycetoma
B Meningitis
C Oral thrush
D Endocarditis

Explanation: The correct answer to the question is: Mycetoma

Question 160: CD4 count in normal healthy adult is_______________?

A 300
B 200
C 500
D 1000

Explanation: The correct answer to the question is: 1000

Question 161: A darkfield microscope would be useful in examining blood for_______________?

A Treponema
B Streptococcus
C Actinomyces
D Mycobacterium

Explanation: The correct answer to the question is: Treponema

Question 162: Immunoglobulins ar secreted by______________?

A Neutrophils
B Macrophages
C Plasma cells
D T-cells

Explanation: The correct answer to the question is: Plasma cells

Question 163: Haptane is_______________?

A Same as epitopes
B Carrier required for specific antibody production
C None of the above
D High molecular protein

Explanation: The correct answer to the question is: Carrier required for specific antibody production

Question 164: Hepatitis A virus is best diagnosed by______________?

A IgM antibodies in serum
B Isolation from bile
C Culture from blood
D Isolation form stool

Explanation: The correct answer to the question is: IgM antibodies in serum

Question 165: VDRL is a________________?

A Slide flocculation test
B Tube flocculation test
C Latex agglutination test
D Tube agglutination test

Explanation: The correct answer to the question is: Slide flocculation test

Question 166: One virus particle prevents multiplication of 2nd virus. This phenomena is____________?

A Supervision
B Permutation
C Viral interference
D Mutation

Explanation: The correct answer to the question is: Viral interference

Question 167: The difference between gram positive and negative bacteria lies in their_______________?

A Mesosomes
B cell membrane
C Nuclear material
D cell wall

Explanation: The correct answer to the question is: cell wall

Question 168: The most common pathogens responsible for nosocomial pneumonias in the ICU are______________?

A Gram positive organisms
B Mycoplasma
C Gram negative organisms
D Virus infections

Explanation: The correct answer to the question is: Gram negative organisms

Question 169: Cell wall deficient bacteria are_______________?

A Spirochetes
B Staphylococci
C Escherichia Coli
D Mycoplasma

Explanation: The correct answer to the question is: Mycoplasma

Question 170: Endotoxins differ from exotoxins in that endotoxins______________?

A activate complement by the alternate pathway
B are heat labile
C are proteins
D are highly antigenic

Explanation: The correct answer to the question is: activate complement by the alternate pathway

Question 171: The Dane particle is the______________?

A HBV
B HBC Ag
C IgG anti HAV
D Delta Virus

Explanation: The correct answer to the question is: HBV

Question 172: Tuberculin test screens for_____________?

A Phagocyte dysfunction
B Complement function
C Cell mediated immunity
D Hemoral immunity

Explanation: The correct answer to the question is: Cell mediated immunity

Question 173: Endoscopes are sterilized by using_______________?

A Autoclaving
B Cidex
C Gamma radiation
D Boiling

Explanation: The correct answer to the question is: Boiling

Question 174: One of the following statement about statements about sterilization is not true_______________?

A Glass syringes ? Boiling at 169
B Liquid paraffin ? Dry heat
C Flash pasteurization of milk ? 72
D Vaccines ? Ethylene oxide

Explanation: The correct answer to the question is: Vaccines ? Ethylene oxide

Question 175: Which of the following is most potent antigen for stimulating both humoral and cell mediated immunity ?

A Lipids
B Proteins
C Adjuvant
D Polysaccharides

Explanation: The correct answer to the question is: Proteins

Question 176: IgG antibodies have a half-life of approximately_______________?

A 1 hour
B 1 day
C 1 week
D 1 Month

Explanation: The correct answer to the question is: 1 Month

Question 177: Exotoxins are____________________?

A Lipid-polysaccharide complex
B Lipoprotein
C None
D Protein compound

Explanation: The correct answer to the question is: Protein compound

Question 178: Following is a retrovirus_____________?

A Immunodeficiency virus
B Influenza
C Hepatitis virus
D Polio virus

Explanation: The correct answer to the question is: Immunodeficiency virus

Question 179: The following immunoglobulin is not known to fix complement_________________?

A IgE
B IgM
C IgG
D IgA

Explanation: The correct answer to the question is: IgE

Question 180: The reaginic antibody is________________?

A IgD
B IgE
C IgA
D IgG

Explanation: The correct answer to the question is: IgE

Question 181: Kaposi

A Between 1000-2000
B Above 600
C Below 200
D Above 2000

Explanation: The correct answer to the question is: Below 200

Question 182: All are not true for cultivation of anaerobic organisms except_______________?

A anaerobic jar
B Incubator
C Centrifuge
D Refrigerator

Explanation: The correct answer to the question is: anaerobic jar

Question 183: Each of the following can cause food poisoning except________________?

A Staphylococcus
B Cl. difficile
C Cl. botulinum
D Cl. welchii

Explanation: The correct answer to the question is: Cl. difficile

Question 184: Which of the following does not go into chronic hepatitis stage ?

A HCV
B HBV
C HDV
D HEV

Explanation: The correct answer to the question is: HEV

Question 185: Physical sterilization was discovered by__________________?

A John Hunter
B Joeph Lister
C Alexander flemings
D Robert Koch

Explanation: The correct answer to the question is: Joeph Lister

Question 186: Which stage of plasmodium vivax is infective to mosquito______________?

A Zygote
B Merozoite
C Sporozoite
D Gametocyte

Explanation: The correct answer to the question is: Gametocyte

Question 187: Rapid diagnosis of Tuberculosis is possible with_______________?

A Auramine-Rhodamine stain
B Kin Young stain
C Ziel Nelson
D Giemsa stain

Explanation: The correct answer to the question is: Auramine-Rhodamine stain

Question 188: Which of the following are correctly matched ?

A All of the above
B Transfer of antibody from mother to child is through colostrum and acquired passive immunity naturally
C Antigenic stimulus given by vaccine (polio) is artificial active immunity
D Injection of antibodies (Hepatitis) is artificially acquired passive immunity

Explanation: The correct answer to the question is: All of the above

Question 189: Which is type II hypersensitivity ?

A Immune complex mediated
B Delayed hypersensitivity
C Anaphylaxis
D Cytotoxic / cytolytic type

Explanation: The correct answer to the question is: Cytotoxic / cytolytic type

Question 190: By using phase contrast microscope_______________?

A External capsule formation can be observed
B Internal structures are differentiated in dead cells
C Internal structures are differentiated in living cells
D Internal metabolic activities can be observed

Explanation: The correct answer to the question is: Internal structures are differentiated in living cells

Question 191: One of the following is a treponemal test for diagnosis of syphilis_____________?

A Widal test
B Wasserman test
C Kahn test
D FTAB

Explanation: The correct answer to the question is: FTAB

Question 192: Which of the following have the capability to produce extra cellular polysaccharides______________?

A Enterococcus
B Peptostreptococcus
C Strep. Mutans
D Strep. pyogenes

Explanation: The correct answer to the question is: Strep. Mutans

Question 193: Opportunistic infection is caused by___________________?

A All of the above
B Penicillium
C Mucor
D Aspergillus