Microbiology Exam MCQ Quiz!
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- 1.Are the agents responsible for bovine spongiform encephalopathy (BSE) (Mad-cow disease)?
- A.
Prions
- B.
Viroids
- C.
Virus
- D.
Prokaryote
- 2.One of the following describes Yeast colonies:
- A.
Tend to spread outward and across larger areas.
- B.
Grow to a certain size and stop and limited in their diameter.
- C.
Fuzzy and fluffy or powdery in appearance.
- D.
Impart a "moldy" odor to their substrates.
- 3.Which one of the following is incorrect with regard to Gram +ve and Gram -ve bacteria:
- A.
In some Gram-positive bacteria glycerol–teichoic acids are bound to membrane lipids
- B.
The envelope of Gram- negative cells is a far more complicated structure than Gram +ve cells.
- C.
Under the light microscope Gram-negative cells appear purple while Gram-positive cells are red.
- D.
The Gram-positive cell wall consists primarily of a single type of molecule
- 4.They are involved in the genetic exchange process of conjugation.
- A.
Fimbriae
- B.
Slime layers
- C.
Flagella
- D.
Pili
- 5.Occur as a result of the exhaustion of essential nutrients and possibly the accumulation of bacteriostatic concentrations of wastes.
- A.
The stationary phase,
- B.
Phase A
- C.
Log phase
- D.
Phase D
- 6.Facultative bacteria:
- A.
Bacteria cannot grow unless oxygen is present in their immediate atmosphere,
- B.
A large number of Bacteria can grow in both in the presence and absence of oxygen
- C.
None of the choices
- D.
Bacteria that inhibited in the presence of oxygen, this gas behaving almost as an intoxicant
- 7.A key characteristic of biofilms:
- A.
Bacterial biofilms are virtually difficult to eliminate with antibiotics or biocides.
- B.
In the human body the resident cells within the biofilm are not exposed to attack by the immune system
- C.
Enveloping of the attached cells in EPS.
- D.
Biofilm formation usually begins with pioneer cells attaching to a surface
- 8.Is the causal organism of venereal disease gonorrhea.
- A.
Bacillus
- B.
Vibrio
- C.
Neisseria
- D.
Campylobacter
- 9.Corynebacterium is the causal organism of:
- A.
Tuberculosis
- B.
Typhoid fever
- C.
Asiatic cholera
- D.
Diphtheria
- 10.Is the causal organism of the tick-borne Lyme disease:
- A.
Borrelia
- B.
Mycobacterium
- C.
Salmonella
- D.
Yersinia
- 11.One of the following dosent Gram-negative rods:
- A.
Vibrio
- B.
Treponema
- C.
Helicobacter
- D.
Haemophilus
- 12.Pseudomonas aeruginosa is resistant to many antibacterial agents.
- A.
True
- B.
False
- 13.Viruses are capable of growing on manufactured medicines or raw materials.
- A.
True
- B.
False
- 14.The Lipid A moiety It is a very potent stimulant of the immune system.
- A.
True
- B.
False
- 15.Gonorrhea is a subclinical disease in males.
- A.
True
- B.
False
- 16.Shigella is considered to be more virulent than Salmonella.
- A.
True
- B.
False
- 17.Which of the following mainly cause the cystitis:
- A.
Bacterial capsules
- B.
Fimbriated (piliated) strains of Neisseria gonorrhoeae
- C.
Fimbriated strains of E. coli
- D.
Nonfimbriated (nonpiliated) strains of N. gonorrhoeae
- 18.Clostridium perfringens spreads deep within the body by secreting one of the following:
- A.
Coagulase
- B.
Necrotizing enzymes
- C.
Kinases
- D.
Collagenase
- 19.Which of the following mainly produce phospholipases that destroy the phagosome membrane:
- A.
Toxoplasma gondii
- B.
Rickettsia rickettsii
- C.
Protozoans
- D.
Mycobacterium tuberculosis
- 20.Biofilms and microcolonies an envelope with polysaccharide matrices.
- A.
True
- B.
False
- 21.Which of the following increases mucin production and decreases the proportion of ciliated epithelial cells:
- A.
Bile salts that contain surfactants
- B.
Inhalation of tobacco smoke
- C.
The possession of surface adhesins
- D.
Extreme acidity and presence of digestive enzymes
- 22.Lachrymal fluids alone can enzymatically degrade the peptidoglycan of Grampositive bacteria such as staphylococci.
- A.
True
- B.
False
- 23.The strategy for the microorganism to kill the phagocyte can be achieved by the production of:
- A.
Endotoxin
- B.
Bile salts
- C.
Leucocidins
- D.
Lipoteichoic acids
- 24.Toxins that indirectly activate plasminogen:
- A.
Haemolysins
- B.
Collagenases
- C.
Hyaluronidases
- D.
Fibrinolysins
- 25.The number of cases of malaria in the U.S. population at this moment, that represents
- A.
The point prevalence
- B.
The period prevalence
- C.
Morbidity
- D.
The incidence of a disease
Questions: 45 | Attempts: 23246 | Last updated: Aug 20, 2020
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