Microbiology Exam MCQ Quiz!

35 Questions | By Pharmacgy | Updated: Mar 22, 2022 | Attempts: 602

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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