اسئلة مادة الجنرال
1. Bacteria without cell Wall
a. Chlamydia
b. Rickettsia
c. Mycoplasma
d. Spirochetes
2. Obligatory Aerobic Bacteria
a. Grow in presence of oxygen traces and 5 – 10% CO2
b. Grow in either presence or absence of oxygen.
c. Grow only in presence of oxygen
d. Grow only in absence of oxygen
3. Brucella Melitensis is
a. Obligatory aerobic bacteria
b. Obligatory anaerobic bacteria
c. Facultative anaerobic bacteria
d. Micro-aerophilic bacteria
4. Function of cell membrane
a. Giving the shape to bacteria
b. Carrying somatinc antigen
c. Excretion of hydrolytic exo-enzymes and toxins
d. Protect the bacteria from plasmolysis
5. Pseudomonas aeroginosa is
a. Peri-trichous bacteria
b. Lopho-trichous bacteria
c. Amphi-trichous bacteria
d. Monotrichous bacteria
6. Short rods, motile by single polar flagellum :
a. Lactobacillus
b. Spirochaeta
c. Vibrio
d. Streptococcus
7. Genetic information of bacteria is carried on
a. Messenger RNA
b. Transfer RN|A
c. Transcript RNA
d. Double – Stranded DNA
8. Thermophilic bacteria grow at
a. 60 – 80°C
b. 0 - 20°C
c. 37°C
d. 100 - 120°C
9. Acidophilic bacteria grow at
a. pH 7.2 – 7.4
b. pH 5.0 – 5.5
c. pH 8.5 – 9.0
d. None of the above
10. Mycoplasma is
a. Neutrophilic bacteria
b. Acidophilic bacteria
c. Basophilic bacteria
d. All of the above
11. It is the adaptation of bacteria to the fresh medium
a. Lag phase
b. Decline phase
c. Logarithmic Phase
d. Stationary phase
12. Bacteria which do not cause hemolysis is
a. Beta-Hemolytic
b. Alpha-Hemolytic
c. Gama Hemolytic
d. None of the above
13. Normal flora of Lower intestine are all of the following except:
a. Staphylococci
b. Diphtheroids
c. Shigella
d. Lactobacillus
14. Opportunistic pathogens are all of the following except:
a. Cause a disease when the host defense are suppressed.
b. Are normal flora of healthy body
c. Are greatly harmful
d. Do not invade the body or tissue.
15. It is circulation of bacterial toxins in blood
a. Pyaemia
b. Toxemia
c. Bacteremia
d. Septicemia
16. Inhibit the growth of micro-organisms
a. Germicidal
b. Germistatic
c. Pathogenicity
d. Virulence
17. For disinfection of mattresses :
a. Hot air oven
b. Autoclave
c. Ethylene Oxide
d. Hydrogen Peroxide
18. For sterilization of serum :
a. Autoclave
b. Boiling
c. Steaming
d. Filtration
19. Obligatory Anaerobic bacteria:
a. Clostridium Tetani
b. Salmonella
c. M. Tuberculosis
d. E-coli
20. Pyschrophilic bacteria grow at:
a. 100°C
b. 60°C
c. 14°C
d. 37°C
21. Bacteria which contain chlorophyll
a. Heterotrophic bacteria
b. Autotrophic bacteria
c. Photosynthetic bacteria
d. All of the above
22. Selective media for fungi is:
a. Sabouraud’s dextrose agar
b. Lowenstein – Jensen Media
c. Loeffler’s media
d. Chocolate agar
23. Tricophyton is one of
a. Yeast
b. Moulds
c. Dermatophyte
d. Dimorphic Fungi
24. Plastomyces is one of
a. Dermatophytes
b. Dimorphic Fungi
c. Yeast
d. Moulds
25. Mechanism of action of penicillin:
a. Inhibit protein synthesis
b. Inhibit Folic acid pathway
c. Inhibit peptidoglycan cross – linking
d. Block peptidoglycan synthesis
26. Antibiotics which inhibit DNA synthesis:
a. Rifampin
b. Quinolones
c. Sulfonamides
d. Tetracylines
27. Color of gram negative bacteria is
a. Violet
b. Green
c. Red
d. Black
28. Acid Fast Bacteria
a. Salmonella
b. Shigella
c. M. Tuberculosis
d. E – Coli
29. Vibrio Cholera is:
a. Neutrophilic Bacteria
b. Acidophilic Bacteria
c. Basophilic Bacteria
d. All of the above
30. Spherical or avoid cells occurring in chains
a. Staphylococci
b. Streptococci
c. Lactobacillus
d. Spiro chaeta
31. All are Prokaryotic cells except:
a. Fungi
b. Bacteria
c. Chlamydia
d. Mycoplasma
32. Viruses:
a. Contain only DNA or RNA
b. They Contain ribosome
c. Did not affected by antibiotics
d. a+c
33. All of these are essential structure except:
a. Nuclear body
b. Spores
c. Cell wall
d. Plasma Membrane
34. ______________ is giving the shape to the bacteria
a. Cytoplasmic Membrane
b. Capsule
c. Cell Wall
d. All of the above
35. One of its functions is selective permeability
a. Cell wall
b. Plasma membrane
c. Capsule
d. Spores
36. They are responsible for Haemagglutination Phenomenon
a. Flagella
b. Fimbria
c. Capsule
d. Cell wall
37. Clostridium Tetani is:
a. Atrichous bacteria
b. Mono-trichous bacteria
c. Amphi-trichous bacteria
d. Peri-trichous bacteria
38. Short curved or straight rods, motile by single polar flagellum
a. spirochaeta
b. Vibrio
c. Escherichia
d. Lactobacillus
39. Small gram negative cocci, occur in pairs
a. staphylococcus
b. streptococcus
c. neisseria
d. non of the above
40. Transfer of genetic information from one bacterium to another by bacteriophages is:
a. Transformation
b. Tansduction
c. Conjugation
d. Mutation
41. Salmonella are:
a. Obligatory Aerobic bacteria
b. Obligatory Anaerobic bacteria
c. Facultative Anaerobic bacteria
d. Micro-aerophilic bacteria
42. According to pH, vibrio cholera is
a. Osmophilic bacteria
b. Basophilic bacteria
c. Acidophilic bacteria
d. Neutrophilic bacteria
43. Staphylococci are:
a. Atrichous bacteria
b. Mono-trichous bacteria
c. Amphi-trichous bacteria
d. Peri-trichous bacteria
44. During replication of DNA, copying errors may occur and this is called
a. Conjugation
b. Transduction
c. Transformation
d. Mutation
15. Obligatory Anaerobic bacteria
a. grow only in presence of oxygen
b. grow only in absence of oxygen
c. grow either in presence or absence of oxygen
d. grow in presence of oxygen traces and 5 – 10% CO2
46. Neutrophilic bacteria grow well at
a. pH 8.5 – 9.0
b. pH 7.2 – 7.4
c. pH 5.0 – 5.5
d. pH 2.5 – 3.0
47. The rate of cell death increase and bacterial growth stopped, this is
a. Adaptation phase
b. Exponential phase .
c. Stationary phase.
d. Decline Phase
48. Beta-hemolytic
a. Cause complete hemolysis of RBC’s الصح
b. Cause chemical change of Hemoglobin in RBC’s
c. Do not cause hemolysis
d. None of them
49. Mesophilic bacteria grow at:
a. 37°C
b. 14°C
c. 60°C
d. 120°C
50. Circulation of Bacteria and its toxins in blood
a. Pyaemia
b. Toxemia
c. Bacteremia
d. Septicemia
51. Disinfections that applied on living or injured tissues:
a. Sterilization
b. Antiseptic
c. Sanitation
d. Decontamination
52. Hot air oven is used for sterilization of
a. Glass
b. Rubber Gloves
c. Plastic Syringes
d. Catheters
53. Disinfectant for superficial fungal infection
a. Phenol
b. Potassium permanganate
c. Chlorine
d. Hypochlorite compounds
54. Rifampin
a. inhibit cell wall synthesis
b. inhibit protein synthesis
c. inhibit folic acid pathway
d. inhibit mRNA synthesis
55. Transacetylase inactivate
a. aminoglycosides
b. chloramphenicol
c. penicillin
d. cephalosporins
56. The color of gram positive bacteria is
a. Yellow
b. Black.
c. Pink
d. Violet
57. Selective media for fungi
b. blood agar
b. Mac Conkey agar
c. Nutrient agar
d. Sabourand’s dextrose agar
58. Histoplasma is a :
a. Systemic mycosis
b. Sub – Cutaneous mycosis
c. Cutaneous mycosis
d. Superficial mycosis
59. All are asexual spores produced by mould except
a. Conidio – spores
b. Sporangio – spores
c. Endospores
d. Arthro – spores
60. They reproduce only by Asexual reproduction
a. Blastomycosis
b. Deutromycosis
c. Ascomycetes
d. Zygomycetes
61. The functions of cell wall is all of the following except:
a. Giving the shape to the bacteria
b. Carrying somatic antigen
c. Selective permeability and transport of solutes
d. Protect the bacteria from plasmolysis
62. Atrichous Bacteria are:
a. Bacteria contain one flagellum
b. Bacteria contain 2 flagella
c. Bacteria without flagella
d. Bacteria with a tuft of flagella
63. ________________ are essential for host cell attachment:
a. Flagella
b. Fimbria
c. Spores
d. Capsules
64. Irregular clusters of spherical cells:
a. Streptococcus
b. Staphylococcus
c. Lactobacillus
d. Escherichia
65. Clostridium Botulinum is:
a. Obligatory Aerobic Bacteria
b. Facultative Anaerobic Bacteria
c. Obligatory Anaerobic Bacteria
d. Micro- aerophilic Bacteria
66. Basophilic Bacteria grow well at:
a. pH 8.5 – 9.0
b. pH 7.2 – 7.4
c. pH 5.0 – 5.5
d. None of the above
67. Cells are divided at high & constant rate:
a. Decline Phase
b. Stationary Phase
c. Log Exponential Phase
d. Adaptation Phase
68. The dominant bacterial species in dental plaque are:
a. Coagulase Negative Staphylococci
b. Lactobacillus
c. Bacteroides
d. Streptococcus Sanguis
69. The spread of Pyogenic Bacteria in blood stream to different organs & produce multiple abscess is:
a. Septicemia
b. Bacteremia
c. Toxemia
d. Pyaemia
70. Inhibit the growth of micro organisms
a. Bacteriostatic
b. Bactericidal
c. Fungicidal
d. Germicidal
71. To sterilize fluid damaged by heat:
a. Gaseous Sterilization
b. Heat Sterilization
c. Filtration
d. Ionizing Radiation
72. For water disinfection we use:
a. Hydrogen peroxide
b. Formaldehyde
c. Chlorine
d. Hypochlorite compounds
73. Mechanism of action of penicillin:
a. Block peptidoglycan synthesis4
b. Inhibit peptidyglycan cross – linking
c. inhibit folic acid pathway
d. inhibit protein synthesis
74. Sulfonamides:
a. inhibit cell wall synthesisالصح
b. inhibit protein synthesis
c. inhibit DNA synthesis
d. inhibit folic acid pathway
75. Acetylase inactivates:
a. B – Lactam antibiotics
b. Aminoglycosides
c. Cloramphenicol
d. All of the above
76. Ringworm disease is caused by
a. Zygomycetes
b. Ascomycetes
c. Blastomycosis
d. None of the above
17. Histoplasm is one of
a. Superficial Mycosis
b. Cutaneous Mycosis
c. Sub – Cutaneous Mycosis
d. Systemic Mycosis
78. For wet – mount technique we add:
a. NaoH
b. K oH
c. H2 O2
d. All of the above
79. Eukaryotic cells:
a. Bacteria
b. Spirochetes
c. Protozoa
d. Mycoplasma
80. All of these about viruses is correct except:
a. Obligatory intracellular parasites
b. Did not contain ribosomes.
c. Contain DNA and RNA
d. Can pass through bacterial filter
81. They are transmitted by arthropods
a. Chlamydia
b. Spirochetes
c. Mycoplasma
d. All of the above
82. In the past they were listed as large viruses
a. Richettsia
b. Mycoplasma
c. Chlamydia
d. None of the above
23. Bacteria multiply by:
a. Replication cycle
b. Simple binary fission
c. Sexual reproduction
d. All of the above
84. One of the accessory structures
a. Cell wall
b. Plasma Membrane
c. Flagella
d. Cytoplasm
85. It protects bacteria from antibiotics
a. Capsule
b. Cell membrane
c. Flagella
d. Fimbria
86. Vibro cholera is:
a. Mono –trichous bacteria
b. Atrichous bacteria
c. Lopho-trichous bacteria
d. Peri-trichous bacteria
87. Short rods, motile by peritrichous flagella
a. Spirochaeta
b. Lactobacillus
c. Escherichia coli
d. Vibrio
88. To take up soluble DNA fragments derived from other, closely related species is:
a. Mutation
b. Transformation
c. Transduction
d. Conjugation
89. Tuberculosis are
a. micro-airophilic
b. Facultative anaerobic
c. Obligatory anaerobic
d. Obligatory aerobic
90. According to pH, Lactobacillusis
a. Neutrophlic bacteria
b. Acidophilic bacteria
c. Basophilic bacteria
d. None of the above
91- function of the cell wall is:
a- support plasma membrane
b- cell division
c- Replication
d- Non of the above
e-
92 - function of cytoplasmic membrane is:
a- transport of solutes into the cell
b- excretion of hydrolytic
c- a & c
d- all of the above
93- capsules staining done by:
a- Indian ink
b- polychrome methylene blue:
c- a & b
d- non of the above
94- function of bacterial capsule is:
a- essential for bacterial virulence
b- help in diagnosis of bacteria
c- protection bacteria
d- all of the above
95- function of bacterial flagella is:
a- essential for motility
b- important for diagnosis
c- carrying flagellar antigen
d- all of the above
96- bacteria classification according to bacterial flagella:
a- atrichous
b- mono-trichous
c- amphi- atrichous
d- all of the above
97- types of bacterial motility:
1- motility by flagella
2- motility by cell body
3- giliding motility
4- all of the above
98- fimbriae are differing from flagella in the:
a- shorter
b- more number
c- present in motile and non-motile bacteria
d- all of the above
99- function of fimbriae:
a- essential for host cell attachment
b- responsible for heamagglutination
c- a & b
d- non of the above
100- bacterial endospores use to resistant of:
a- disinfection
b- dryness
c- heat
d- all of the above