TOP Microbiology MCQS
All Questions for: TOP Microbiology MCQS
Question 101: Which of the following statement about P24 antigen of HIV is Not True ?
- A Virus load parallel P24 titre
- B Free P24 antigen disappears after the appearance of IgM response to it:
- C It remains during asymptomatic phase
- D It can be detected during the window period
Explanation: The correct answer to the question is: It remains during asymptomatic phase
Question 102: A woman with infertility receives an ovary transplant from her sister who is an identical Twin. What type of graft it is ?
- A Allograft
- B Isograft
- C Autograft
- D Xenograft
Explanation: The correct answer to the question is: Isograft
Question 103: In transmission of malaria, mosquito bite transfers_______________?
- A Gametocyte
- B Merozoite
- C Hypnozoite
- D Sporozoite
Explanation: The correct answer to the question is: Sporozoite
Question 104: Virus infected cell is killed by________________?
- A Macrophages
- B Autolysis
- C Neutrophils
- D Interferons
Explanation: The correct answer to the question is: Interferons
Question 105: In small intestine, cholera toxin acts by______________?
- A ADP
- B Active absorption of NaCI
- C Inhibition of adenyl cyclase
- D Activation of GTPase
Explanation: The correct answer to the question is: ADP
Question 106: Subacute bacterial endocarditis is caused by_____________?
- A Haemolytic streptococci
- B Staphylococcus aureus
- C Nisseria
- D Streptococcus viridans
Explanation: The correct answer to the question is: Streptococcus viridans
Question 107: Sterilization of liquid paraffin is done by______________?
- A Inspissation
- B Hot air oven
- C UV-Radiation
- D Autoclaving
Explanation: The correct answer to the question is: Hot air oven
Question 108: Candida is most often implicated in causation___________________?
- A Conjunctivitis
- B Desert rheumatism
- C Thrush
- D Tenea capitis
Explanation: The correct answer to the question is: Thrush
Question 109: Diphtheria is pathogenic only when infected with______________?
- A Alfa phage
- B Lambda K12
- C Beta phage
- D Delta Phage
Explanation: The correct answer to the question is: Beta phage
Question 110: The antigen used in Weil Felix test is obtained from________________?
- A Staphylococcus
- B Proteus
- C coli
Explanation: The correct answer to the question is: Proteus
Question 111: In HIV, gp 120, envelope glycoproteins bind specifically to______________?
- A CD4 T-cells
- B CD8 T-cells
- C B
- D NK
Explanation: The correct answer to the question is: CD4 T-cells
Question 112: Actinomycosis is caused by______________?
- A Fungus
- B Retrovirus
- C Anaerobic, gram positive, non-acid fast bacteria.
- D Acid fast, non-motile bacillus
Explanation: The correct answer to the question is: Anaerobic, gram positive, non-acid fast bacteria.
Question 113: The following hepatitis virus is transmitted by faeco-oral route________________?
- A Hepatitis E virus
- B Hepatitis B virus
- C Hepatitis D virus
- D Hepatitis C virus
Explanation: The correct answer to the question is: Hepatitis E virus
Question 114: During the Window period of patient with AIDS_______________?
- A Both are
- B Western Blot is
- C PCR is
- D ELISA IS
Explanation: The correct answer to the question is: Both are
Question 115: Lepromin test is useful for________________?
- A Epidemiology
- B Treatment plan
- C Diagnosis
- D Prognosis
Explanation: The correct answer to the question is: Prognosis
Question 116: Staphylococci typically occur in_________________?
- A Chains
- B Irregular clusters
- C Tetrads
- D Pairs
Explanation: The correct answer to the question is: Irregular clusters
Question 117: The binding site for complement on the IgG molecule is in the________________?
- A CH2 domian
- B VL domian
- C CL domian
- D CH1 domian
Explanation: The correct answer to the question is: CH2 domian
Question 118: Multiple drug resistance of bacteria depends on which of the following_______________?
- A All of the above
- B Fertility factor (F+)
- C Colicigenic factor (Col)
- D Resistance transfer factor (RTF)
Explanation: The correct answer to the question is: Resistance transfer factor (RTF)
Question 119: Immunity that is conferred to the foetus by transfer of IgG and IgA antibodies is called as______________?
- A Active acquired immunity
- B Passive acquired immunity
- C Passive natural immunity
- D Natural active immunity
Explanation: The correct answer to the question is: Passive natural immunity
Question 120: Viron is defined as______________?
- A A smallest particle similar to virus
- B Extracellular infectious virus particle
- C Smallest virus
- D None of the above
Explanation: The correct answer to the question is: Extracellular infectious virus particle
Question 121: Cough plate method is used to identify________________?
- A Y. pestis
- B Pertussis
- C Mycoplasma
- D M-Tuberculosis
Explanation: The correct answer to the question is: Pertussis
Question 122: Detergents used to disinfect dental instruments in the office kill bacteria by interfering with functional of the cell______________?
- A nucleus
- B membrane
- C Capsule
- D wall
Explanation: The correct answer to the question is: membrane
Question 123: A dentist suffred from Hepatitis B infection 3 months back. His laboratory tests are normal but he is not allowed by the medical board to do surgical practice. He is_____________?
- A Inactive carrier
- B Healthy carrier
- C Convalscent carrier
- D Paradoxical carrier
Explanation: The correct answer to the question is: Convalscent carrier
Question 124: Sunlight acts as sterilizing agent because_________________?
- A Long wavelength
- B short wave lenght
- C Ozone
- D Heat
Explanation: The correct answer to the question is: short wave lenght
Question 125: Seroconversion in HIV infection takes place in______________?
- A 4 weeks
- B 9 weeks
- C 2 weeks
- D 12 weeks
Explanation: The correct answer to the question is: 4 weeks
Question 126: What is the sequence which a retro virus follows on entering a host cell ?
- A RNA -DNA-RNA
- B RNA-DNA
- C DNA-RNA-DNA
- D DNA-RNA
Explanation: The correct answer to the question is: RNA -DNA-RNA
Question 127: Nagglers reaction detects________________?
- A None of the above
- B Lecithinase
- C Coagulase
- D Hyaluronidase
Explanation: The correct answer to the question is: Lecithinase
Question 128: Man is the only reservoir for_______________?
- A Camphylobacter jejuni
- B histolytica
- C Y. enterocolitica
Explanation: The correct answer to the question is: histolytica
Question 129: Opacity around colonies of Clostridium perfringens is due to_________________?
- A Cytokinin
- B Lecithinase
- C Theta toxin
- D Desmolase
Explanation: The correct answer to the question is: Lecithinase
Question 130: Bacteria acquire characteristics by all of the following except___________________?
- A Though plasmids
- B through conjugation
- C Incorporating part of host DNA
- D Through bacteriophages
Explanation: The correct answer to the question is: Incorporating part of host DNA
Question 131: An example of naturally acquired passive immunity is__________________?
- A Immune blood transfusion
- B Hepatitis vaccination
- C Gamma globulin injection
- D Placental transfer of antibodies
Explanation: The correct answer to the question is: Placental transfer of antibodies
Question 132: All are true about legionella pneumophilia except______________?
- A It can replicate in amoeba
- B Aquatic bodies are main habitat
- C Person to person transmission
- D Urine test is a reliable method
Explanation: The correct answer to the question is: Person to person transmission
Question 133: Smith noguchi
- A Klebsiella
- B Bacillus
- C Spirochetes
- D Salmonella
Explanation: The correct answer to the question is: Spirochetes
Question 134: Tyndallisation is carried out for________________?
- A Three successive days
- B Two successive days
- C One day
- D 60 minutes
Explanation: The correct answer to the question is: Three successive days
Question 135: Prions true is____________?
- A Sensitive to most chemical sterilization
- B Contains DNA/ RNA
- C Evokes strong immunogenic reaction
- D Readily inactivated by autoclave at 121 C
Explanation: The correct answer to the question is: Readily inactivated by autoclave at 121 C
Question 136: Type IV hypersensitivity reaction is mediated by which of the following________________?
- A Plasma cells
- B Active T cells
- C NK cells
- D B-cells
Explanation: The correct answer to the question is: Active T cells
Question 137: All are oncogenic except________________?
- A Culex
- B Mansoni
- C Anopheles
- D Aedes
Explanation: The correct answer to the question is: Aedes
Question 138: Which of the following viruses appears to be involved in the pathogenesis of Kaposi
- A Human Herpes Virus 1
- B Human Herpes Virus 3
- C Human Herpes Virus 4
- D Human Herpes Virus 8
Explanation: The correct answer to the question is: Human Herpes Virus 4
Question 139: Following are the characteristics of Vincent
- A Ulcerative gingivostomatitis
- B Caused by leptospira interrogans
- C Caused due to malnutrition
- D A symbiotic infection
Explanation: The correct answer to the question is: Caused by leptospira interrogans
Question 140: Rapid evaluation of fungal hyphae/spores can be achieved with_______________?
- A Grocott Gomori Methenamine silver
- B Hematoxylin and Eosin
- C Peri-iodic Acid Schiff
- D KOH wet mount
Explanation: The correct answer to the question is: KOH wet mount
Question 141: The serum concentration of which of the following human IgG subclass is maximum ?
- A IgG4
- B IgG1
- C IgG2
- D IgG3
Explanation: The correct answer to the question is: IgG1
Question 142: Cytopathic effect is shown by_____________?
- A Spirochete
- B Virus
- C Bacteria
- D Anaerobe
Explanation: The correct answer to the question is: Virus
Question 143: Methods for the diagnosis of superficial fungal infection________________?
- A KOH staining
- B Wood light examination
- C Microscopic examination of skin scrapings
- D All of the above
Explanation: The correct answer to the question is: All of the above
Question 144: Culture medium used for Bordatella pertussis is_________________?
- A Wilson Blair medium
- B Bile broth
- C Bordet Gengou medium
- D Robertson cooked meat medium
Explanation: The correct answer to the question is: Bordet Gengou medium
Question 145: Antibody to HSV will begin to appear_____________________?
- A antibodies are present in recurrent and chronic apthous stomatitis
- B in a week and reach a peak in 3 weeks
- C only after one year
- D no antibodies are present in primary HSV
Explanation: The correct answer to the question is: in a week and reach a peak in 3 weeks
Question 146: Graft versus host reaction is caused by_________________?
- A Monocytes
- B T-lymphocytes
- C B-Lymphocytes
- D Leukocytes
Explanation: The correct answer to the question is: T-lymphocytes
Question 147: Black pigmented anaerobes include all of the following except______________?
- A Buccae
- B Prevotella
- C Porphyromonas
- D Tannerella
Explanation: The correct answer to the question is: Buccae
Question 148: A protoplast is best characterized as a bacterial cell______________?
- A with a cell wall but free of a capsule
- B Uniquely sensitive to penicillin
- C containing a cell wall and a capsule
- D Free of a cell wall and a capsule
Explanation: The correct answer to the question is: Free of a cell wall and a capsule
Question 149: Components of innate immunity that are active against viral cells includes______________?
- A Cytotoxic T cells
- B Memory B cells
- C B cells
- D NK Cells
Explanation: The correct answer to the question is: NK Cells
Question 150: Grape bunch shaped colonies are seen in______________?
- A Gonococci
- B Streptococcus
- C Staphylococcus
- D E.coli
Explanation: The correct answer to the question is: Staphylococcus