Some of Common Microbiology MCQs for Laboratory Technicians, Technologists, DHA, HAAD, MLT, DMLT, MOH and Many other Exames

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Microbiology MCqs

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Questions 2451 to 2500

  1. In algae, advanced type of sexual reproduction is
    1. Isogamy
    2. Anisogamy
    3. Oogamy ✔
    4. None of these
  2. Alginic acids and its salts are obtained from the wall of
    1. Red algae
    2. Brown algae ✔
    3. Green algae
    4. Red and brown algae
  3. The molds obtained nutrition from dead and decaying matter which are called
    1. Saphrophytes ✔
    2. Parasites
    3. Commensals
    4. None of these
  4. Most molds are capable of growing in the temperature range between
    1. 0o – 25oC
    2. 0o – 35oC ✔
    3. 10o – 25oC
    4. 10o – 35oC
  5. Examples for actinomycetes
    1. Streptomyces
    2. Spirillospora
    3. Frankia
    4. Dermatophillia ✔
    5. All of the above
  6. Pellicle is found in only
    1. Algae
    2. Fungi ✔
    3. Bacteria
    4. Protozoans
  7. The Largest virus is
    1. Parvo virus
    2. Pox virus ✔
    3. Rhabdo virus
    4. None of these
  8. The smallest virus is
    1. Parvo virus
    2. Rhabdo virus ✔
    3. Pox virus
    4. Adeno virus
  9. The extra cellular infections virus particle is called
    1. Capsid
    2. Nucleocapsid
    3. Virion ✔
    4. None of these
  10. Shape of bacteriophage is
    1. Brick shape
    2. Bullet shape
    3. Helical shape
    4. Tadpole shape ✔
  11. If only one stain is used for staining a specimen
    1. Simple staining ✔
    2. Negative staining
    3. Differential staining
    4. None of these
  12. Other than the sample (specimen) the remaining portion is stained then it is called
    1. Simple staining
    2. Negative staining ✔
    3. Differential staining
    4. None of these
  13. If more than one stain is used, such staining is called
    1. Simple staining
    2. Negative staining
    3. Differential staining ✔
    4. None of these
  14. ‘Fluorescence’ was first observed by
    1. Kohler ✔
    2. Coons
    3. Both a and b
    4. None of these
  15. By using fluorescence property fluorescent antibody technique was developed by
    1. Kohler
    2. Coons ✔
    3. Both and b
    4. None of these
  16. During staining for Electron Microscopy, the method which improves contrast of specimen is
    1. Positive staining
    2. Negative staining ✔
    3. Shadow staining
    4. None of these
  17. The inorganic forms of nitrogen, which are accepted by bacteria are
    1. Nitrates
    2. Nitrites
    3. Ammonium salts
    4. All of these ✔
  18. Archaeo bacteria are known as
    1. Halophiles
    2. Red extreme halophiles ✔
    3. Osmophiles
    4. Extreme thermophiles
  19. Nitrite is converted into nitrate by the bacteria
    1. Nitrosomonas
    2. Nitrosocytes
    3. Nitrobacter ✔
    4. Azatobacter
  20. Sulphur oxidizing bacteria is
    1. Alcaligenes
    2. Pseudomonas
    3. Thiobacillus ✔
    4. None of these
  21. Bacillus Schlegelli is
    1. Hydrogen – Oxydising bacteria ✔
    2. Sulphur – Oxydising bacteria
    3. Iron-Oxidising bacteria
    4. Nitrite oxidizing bacteria
  22. The group of bacteria which deopends on organic sources in nature for their energy requirements. They are said to be
    1. Chemotrophs
    2. Phototrophs
    3. Heterotrophes ✔
    4. Organotrophs
  23. Majority of bacteria are
    1. Saprophytes
    2. Symbionts
    3. Commensals
    4. Parasites ✔
  24. Symbionts are
    1. Bacteria in symbiotc association
    2. The group of fungi in symbiotic association
    3. The groups participating in symbiotic association ✔
    4. All of these
  25. The best example for symbiotic association is
    1. E.coli in intestine of man
    2. Lichens ✔
    3. Normal floraof skin
    4. All of the above
  1. The enzymes responsible for decomposition is
    1. Lipolytic
    2. Proteolytic ✔
    3. Lysozyme
    4. Both a and b
  2. Urea is decomposed by the species
    1. Micrococcus sps.
    2. Nitrosomonas sps.
    3. Proteus sps.
    4. Both a and c ✔
  3. Phycobiont is
    1. The algal part in Lichens ✔
    2. The fungal part in Lichens
    3. Laustoria formation
    4. None of these
  4. Parasitic form must contain
    1. Capsules ✔
    2. Cell-wall
    3. Endospores
    4. Flagella
  5. The total no. of genes in the group of same individuals is
    1. Genome
    2. Gene map
    3. Gene pool ✔
    4. None of these
  6. Transformation was observed mainly in
    1. Bacteriophages
    2. Temperate phages ✔
    3. ? –phage
    4. All of these
  7. Capsulated forms of bacteria are
    1. Virulent
    2. A virulent
    3. Useful ✔
    4. Symbiotic
  8. The bacterial cells participating in conjugation are
    1. Conjugants ✔
    2. Fertile cells
    3. Exconjugants
    4. None of these
  9. Phagocytes are
    1. Monocytes
    2. Macrophages
    3. Basophils
    4. All of these ✔
  10. The microorganism engulfed by phagocyte resides in a vacuole is known as
    1. Phagosome ✔
    2. Lysosome
    3. both a and b
    4. None of these
  11. Toxic products in phagolysosome are
    1. H2 SO4
    2. Singlet O2
    3. Superoxide radicals
    4. All of these ✔
  12. During destruction of antigen particle in phagolysosome the product formed in phagolysosome the product formed during formulation is
    1. Acetic acid
    2. Lactic acid ✔
    3. Citric acid
    4. None of these
  13. The coating of a bacterium with antibody or complement that leads to enhanced phagocytosis of the bacterium by phagocytes is called
    1. Opsonisation ✔
    2. Aggulation
    3. CFT
    4. None of these
  14. Attenuation means
    1. Killing of the bacteria (microorganism)
    2. Inactivation of bacteria ✔
    3. More activating the bacteria
    4. Both 1 and 2
  15. Infection that results in pus formation are called
    1. Focal infection
    2. Acute infection
    3. Pyogenic infection ✔
    4. Chronic infection
  16. Presence of viable bacteria in the blood stream is called
    1. Viraemia
    2. Septicaemia
    3. Bacteraemia ✔
    4. Bactericidal
  17. Presence of viruses in the blood stream is known as
    1. Viraemia ✔
    2. Bacteraemia
    3. Septicaemia
    4. Pyemia
  18. Opsonin is the
    1. Cellwall component
    2. Plasma component
    3. Serum component ✔
    4. Cytoplasm component
  19. ßßß-haemolytic bacteria is
    1. Streptococcus pyogenes ✔
    2. Str. pneumoniae
    3. Str. viridans
    4. Str. faecalis
  20. The natural reservoir of infection for cholera is
    1. Flies
    2. Horse
    3. Man ✔
    4. None of these
  21. Main cause for Cholera is
    1. Poverty and insanitation ✔
    2. Mosquitoes
    3. Toxin produced by pesticides
    4. None of these
  22. Vibrio cholera differs from vibrio eltor by
    1. It shares some Inaba, Ogawa subtypes with eltor
    2. Resistant to polymuxin
    3. Eltor is non-motile
    4. Causes less subclinical infections as compared to eltor ✔
  23. Cholera vaccine gives protection for
    1. 1 – 3 months
    2. 3 – 6 months ✔
    3. 6 – 9 months
    4. 9-12 months
  24. Prophylaxis of cholera is
    1. Protected water supply
    2. Environmental sanitation
    3. Immunisation with killed vaccines
    4. All of these ✔
  25. Sh.dysenteriae is also known as
    1. Sh.shiga
    2. Sh.schmitzi
    3. Both a and b ✔
    4. Sh.para dysenteriae
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