MCQOPTIONS
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MCQOPTIONS
This section includes 100 Mcqs, each offering curated multiple-choice questions to sharpen your Bacteria knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Primari infection is |
| A. | initial infection with organism in host |
| B. | subsequent infection by the same organism |
| C. | situation, when patient suffering from a disease and new infection is set up from external source |
| D. | all of the above |
| Answer» B. subsequent infection by the same organism | |
| 2. |
On of the following statements about endotoxins is false |
| A. | they are heat stable |
| B. | protein-polysaccharide-lipid complex in nature |
| C. | a ti n is often nz m ti |
| D. | is produced b Gram-negative bacteria |
| Answer» D. is produced b Gram-negative bacteria | |
| 3. |
H antigen is a |
| A. | somatic antigen |
| B. | capsular antigen |
| C. | flagellar antigen |
| D. | virulent antigen |
| Answer» D. virulent antigen | |
| 4. |
The antigen causing agglutination is called |
| A. | agglutinogen |
| B. | agglutinate |
| C. | agglutinin |
| D. | precipitinogen |
| Answer» B. agglutinate | |
| 5. |
The interaction between somatic antigens and specific antibodies is |
| A. | slow and fine granular sediment forms in 18-20 hrs. agglutinate do not break upon shaking |
| B. | rapid and fine granular sediment forms in 5-10 hrs. agglutinate do not break upon shaking |
| C. | rapid and large flocculi form in 2-4 hrs. agglutinate readily break upon shaking |
| D. | slow and large flocculi form in 3-4 days agglutinate readily break upon shaking |
| Answer» B. rapid and fine granular sediment forms in 5-10 hrs. agglutinate do not break upon shaking | |
| 6. |
K antigen is a |
| A. | somatic antigen |
| B. | capsular antigen |
| C. | flagellar antigen |
| D. | virulent antigen |
| Answer» C. flagellar antigen | |
| 7. |
Erythrocytes sensitized with antigens are called |
| A. | erythrocytic diagnosticum |
| B. | haemolytic serum |
| C. | diagnostic serum |
| D. | haemolytic system |
| Answer» B. haemolytic serum | |
| 8. |
Standard quantitative method is a |
| A. | slide agglutination |
| B. | microagglutination |
| C. | tube agglutination |
| D. | all of the b v |
| Answer» D. all of the b v | |
| 9. |
Monoclonal antibodies are used in |
| A. | Immunotherapy |
| B. | Immunological identification of cells and tissues |
| C. | Radioimmuno-imaging |
| D. | ll of the b v |
| Answer» E. | |
| 10. |
Immunofluorescence test is a |
| A. | reaction of precipitation |
| B. | reaction of agglutination |
| C. | lysis test |
| D. | serological reaction with the use of labels |
| Answer» E. | |
| 11. |
Gen is a |
| A. | segment of DNA carrying codons specifying for a particular polypeptide |
| B. | triple nucleotide group, coding one specific amino acid |
| C. | triple nucleotide group, not coding one specific amino acid |
| D. | segment of RNA |
| Answer» B. triple nucleotide group, coding one specific amino acid | |
| 12. |
Transcription is the process by which |
| A. | m-RNA, in conjugation with t-RNA and the ribosome, directs the synthesis of specific protein |
| B. | genetic information carried in the bacterial DNA is transferred to m-RNA |
| C. | DNA is formed a new identical copy |
| D. | genetic information carried in the bacterial RNA is transferred to DNA |
| Answer» C. DNA is formed a new identical copy | |
| 13. |
Redaction of virulence is known us |
| A. | attenuation |
| B. | initiation |
| C. | exaltation |
| D. | inhibition |
| Answer» B. initiation | |
| 14. |
Cross infection is |
| A. | initial infection with organism in host |
| B. | subsequent infection by the same organism |
| C. | situation, when patient suffering from a disease and new infection is set up from external source |
| D. | all of the above |
| Answer» D. all of the above | |
| 15. |
On of the following statements about exotoxins is false |
| A. | a ti n is often nzym ti |
| B. | h v specific tissue affinity |
| C. | are tiv in very minute doses |
| D. | polysaccharide-lipid complex in nature |
| Answer» E. | |
| 16. |
Reinfecton infection is |
| A. | initial infection with organism in host |
| B. | subsequent infection by the same organism |
| C. | situation, when patient suffering from a disease and new infection is set up from external source |
| D. | all of the above |
| Answer» C. situation, when patient suffering from a disease and new infection is set up from external source | |
| 17. |
Pandemic disease is |
| A. | constantly present in particular area |
| B. | spreads rapidly, involving many persons in an area at the same time |
| C. | spreads through many areas of the world involving many persons within a shot period |
| D. | spreads slowly, involving several persons in an area at the same time |
| Answer» D. spreads slowly, involving several persons in an area at the same time | |
| 18. |
Epidemic disease is |
| A. | constantly present in particular area |
| B. | spreads rapidly, involving many persons in an area at the same time |
| C. | spreads through many areas of the world involving many persons within a shot period |
| D. | spreads slowly, involving several persons in an area at the same time |
| Answer» C. spreads through many areas of the world involving many persons within a shot period | |
| 19. |
Attachment structures of the bacteria is a |
| A. | pili |
| B. | fimbriae |
| C. | colonization factors |
| D. | all of the above |
| Answer» E. | |
| 20. |
This is analogous to mesosomes of bacteria |
| A. | Golgi apparatus of eukaryotes |
| B. | Lysosomes of eukaryotes |
| C. | Mitochondria of eukaryotes |
| D. | None of the above |
| Answer» D. None of the above | |
| 21. |
The covalent bond which links the cell walls of gram-positive bacteria containing two modified sugars N acetylmuramic acid (NAM) and N-acetyl glucosamine (NAG) is |
| A. | glycosidic bond |
| B. | 1,4-glycosidic bond |
| C. | 1,6-glycosidic bond |
| D. | glycosidic bond |
| Answer» C. 1,6-glycosidic bond | |
| 22. |
What is Chemotaxis? |
| A. | Swimming towards a bacteria |
| B. | Swimming away of a bacteria |
| C. | In the presence of a chemical compound, swimming towards or away of a bacteria |
| D. | None of these |
| Answer» D. None of these | |
| 23. |
Which one of these has a Chinese letter arrangement? |
| A. | Clostridium tetani |
| B. | Mycobacterium tuberculosis |
| C. | Bacillus anthracis |
| D. | Corynebacterium diphtheriae |
| Answer» E. | |
| 24. |
This about cell wall of gram-positive bacteria is true |
| A. | cell wall comprises of many layers |
| B. | the cell wall is thicker than the associated gram-negative bacteria |
| C. | Cell wall comprises of teichoic acids |
| D. | All of the above |
| Answer» E. | |
| 25. |
Which of these is a cocci occurring in single or pairs? |
| A. | Diplococci |
| B. | Streptococci |
| C. | Tetracocci |
| D. | None of the above |
| Answer» B. Streptococci | |
| 26. |
Flagella in bacteria enable them to |
| A. | reproduce |
| B. | locomote |
| C. | Thrive in nutrient agar |
| D. | Adhere to tissue surfaces |
| Answer» C. Thrive in nutrient agar | |
| 27. |
What is a cluster of polar flagella called? |
| A. | Petritrichous |
| B. | Monotrichous |
| C. | Amphitrichous |
| D. | Lophotrichous |
| Answer» E. | |
| 28. |
Which of this bacteria is resistant to penicillin as it lacks a cell wall? |
| A. | Spirochetes |
| B. | Cyanobacteria |
| C. | Mycoplasmas |
| D. | Bdellovibrios |
| Answer» D. Bdellovibrios | |
| 29. |
Subunit vaccines contain |
| A. | attenuated bacteria |
| B. | immunogenic component of the bacteria |
| C. | inactivated bacteria |
| D. | inactivated toxin |
| Answer» C. inactivated bacteria | |
| 30. |
Toxoid contain |
| A. | attenuated bacteria |
| B. | immunogenic component of the bacteria |
| C. | inactivated bacteria |
| D. | inactivated toxin |
| Answer» E. | |
| 31. |
Killed corpuscular vaccines contain |
| A. | attenuated bacteria |
| B. | immunogenic component of the bacteria |
| C. | inactivated bacteria |
| D. | inactivated toxin |
| Answer» D. inactivated toxin | |
| 32. |
Live vaccines contain |
| A. | attenuated bacteria |
| B. | immunogenic component of the bacteria |
| C. | inactivated bacteria |
| D. | inactivated toxin |
| Answer» B. immunogenic component of the bacteria | |
| 33. |
Growth factor are |
| A. | Mineral salts |
| B. | Ammonium salts |
| C. | Hydrogen, carbon, nitrogen |
| D. | Essential substances which is bacteria can t synthesize by themselves |
| Answer» E. | |
| 34. |
Differential media contain all of the following EXCEPT |
| A. | Basal medium |
| B. | Substances that inhibit microorganisms |
| C. | Sugar concerned |
| D. | Indicator |
| Answer» C. Sugar concerned | |
| 35. |
Blood agar is a |
| A. | differential media |
| B. | enriched media |
| C. | selective media |
| D. | simple media |
| Answer» C. selective media | |
| 36. |
Nutrient agar is prepared by addition of |
| A. | 0% agar in nutrient broth |
| B. | 3% agar in nutrient broth |
| C. | 5% agar in nutrient broth |
| D. | 10% agar in nutrient broth |
| Answer» C. 5% agar in nutrient broth | |
| 37. |
Salt agar is a |
| A. | differential media |
| B. | enriched media |
| C. | selective media |
| D. | simple media |
| Answer» D. simple media | |
| 38. |
Endos medium is a |
| A. | differential media |
| B. | enriched media |
| C. | selective media |
| D. | simple media |
| Answer» B. enriched media | |
| 39. |
During decline phase |
| A. | Microorganisms phase increase in size of cell and metabolic rate |
| B. | The cells start dividing and their number increase by geometric progression |
| C. | Rate of multiplication and death becomes almost equal |
| D. | Population of the cells decreases |
| Answer» E. | |
| 40. |
During stationary phase |
| A. | Microorganisms phase increase in size of cell and metabolic rate |
| B. | The cells start dividing and their number increase by geometric progression |
| C. | Rate of multiplication and death becomes almost equal |
| D. | Population of the cells decreases |
| Answer» D. Population of the cells decreases | |
| 41. |
The function of n adjuvant in a vaccine is |
| A. | distribution |
| B. | absorption |
| C. | antigenicity |
| D. | metabolism |
| Answer» D. metabolism | |
| 42. |
During log phase |
| A. | Microorganisms phase increase in size of cell and metabolic rate |
| B. | The cells start dividing and their number increase by geometric progression |
| C. | Rate of multiplication and death becomes almost equal |
| D. | Population of the cells decreases |
| Answer» C. Rate of multiplication and death becomes almost equal | |
| 43. |
Bacteria that is can t grow in the presence of oxygen are |
| A. | Strict anaerobes |
| B. | Strict aerobes |
| C. | Facultative anaerobes |
| D. | Microaerophilic |
| Answer» B. Strict aerobes | |
| 44. |
Active immunity is not acquired b |
| A. | infection |
| B. | vaccination |
| C. | immunoglobulin transfer |
| D. | subclinical infection |
| Answer» D. subclinical infection | |
| 45. |
Diagnosticum contain |
| A. | unknown antigen |
| B. | unknown antibody |
| C. | known antigen |
| D. | known antibody |
| Answer» D. known antibody | |
| 46. |
The components for complement fixation reaction |
| A. | an antigen, an antibody, complement, sheep erythrocytes, hemolytic serum |
| B. | an antibody, complement, sheep erythrocytes, hemolytic serum |
| C. | an antigen, complement, sheep erythrocytes, hemolytic serum |
| D. | an antigen, an antibody, complement, hemolytic serum |
| Answer» B. an antibody, complement, sheep erythrocytes, hemolytic serum | |
| 47. |
Spirochetes can be visualized by |
| A. | dark field microscopy |
| B. | silver impregnation by Morozov |
| C. | Romonovsky Giemsa and Burry methods |
| D. | All the above |
| Answer» E. | |
| 48. |
During lag phase increase |
| A. | Microorganisms increase in size of cell and metabolic rate |
| B. | The cells start dividing and their number increase by geometric progression |
| C. | Rate of multiplication and death becomes almost equal |
| D. | Population of the cells decreases |
| Answer» B. The cells start dividing and their number increase by geometric progression | |
| 49. |
Forth phase of viral multiplication cycle |
| A. | penetration |
| B. | biosynthesis |
| C. | uncoating |
| D. | adsorption or attachment |
| Answer» C. uncoating | |
| 50. |
First phase of viral multiplication cycle |
| A. | penetration |
| B. | biosynthesis |
| C. | uncoating |
| D. | adsorption or attachment |
| Answer» E. | |