Microbiology - The B-lymphocyte

Microbiology

Question 11. The B-lymphocyte

1. Is thymus derived.
2. Matures in the thymus gland in all birds and mammals.
3. When activated will divide and form specialized plasma cells which produce antibodies. 
4. Engages in a spectrum of immune functions characterized as cell-mediated immunity.
5. Question 21.The absence of hemolysis on a blood agar plate is referred to as _______ hemolysis
   1. Alpha
   2. Beta
   3. Gamma
   4. Delta
6. Question 31. Microbial resistance to drugs is acquired through
   1. Conjugation
   2. Transformation
   3. Transduction
   4. All of these answers contribute
7. Question 41. The field of study in which medicine and microbiology intersect is known as medical microbiology
   1. True
   2. False
8. Question 51. All of the following are methods that can be used to isolate bacteria from a mixed culture EXCEPT
   1. Streak plating
   2. Loop dilution pour plating
   3. Gram staining
   4. Serial dilution followed by spread plating
9. Question 61. The progeny cells of a B cell clone are called
   1. Antibodies.
   2. Activated macrophages.
   3. Sensitized T cells.
   4. Bursa cells.
   5. Plasma cells. 
10. Question 71. Mannitol salt agar is used to select strains of staphylococci from streptococci and enterococci within the sample.
    1. True
    2. False
11. Question 81. Before attempting to identify an unknown bacterial species using traditional methods, the organism must be isolated in a pure culture.
    1. True
    2. False
12. Question 91. Natural passive immunity involves the passing of antibodies from mother to infant and acts immediately but is short-lived.
    1. True
    2. False
13. Question 101. Key historical discoveries leading to the field of medical microbiology include all but which of the following:
    1. Koch’s postulates
    2. Lister’s development of aseptic technique
    3. Mendel’s principles of genetics
    4. Leeuwenhoek’s discovery of animalcules under the microscope
14. Question 111. Any clear zone of inhibition around an antibiotic disc being used for identification is a clear indication that the organism is sensitive to the antibiotic.
    1. True
    2. False
15. Question 121. A vaccine that contains a protein conjugated to a capsule polysaccharide is called
    1. Acellular
    2. Attenuated
    3. Conjugate
    4. Subunit
16. Question 131. Five classes of antibodies include
    1. IgG, IgA, IgM, IgD, and IgE
    2. IgA, IgB, IgD, IgE, and IgM
    3. IgB, IgC, IgD, IgE, and IgM
    4. IgG, IgB, IgM, IgD, and IgE
17. Question 141. The _________ test involves using rabbit plasma as a reagent and its results are determined by observation of thickening of the medium.
    1. Catalase
    2. Oxidase
    3. Coagulase
    4. Peroxidase
18. Question 151. The majority of white blood cells in circulation include
    1. Neutrophils and lymphocytes.
    2. Eosinophils and basophils.
    3. Macrophages.
    4. Erythrocytes.
19. Question 161. Characteristics of an ideal antimicrobial drug include all EXCEPT
    1. Toxic to the specific microbe but nontoxic to the host
    2. Readily delivered to the site of infection
    3. Does not lead to the development of antimicrobial resistance
    4. Easy to administer but able to reach the infectious agent anywhere in the body
    5. All of the answers are correct
20. Question 171. Infections that are more common during pregnancy include all the following EXCEPT
    1. Malaria
    2. Urinary tract infections
    3. Candidiasis
    4. Poliomyelitis
    5. Syphilis
21. Question 181. How do you determine the species of an unknown bacterium?
    1. You should make a careful investigation of the morphology of the bacterial cells using a microscope to make a firm identification.
    2. You need to quantify the number of bacteria in the same to determine the species.
    3. Identification can only be made based on the patient’s signs and symptoms.
    4. You use standard tests and pre-existing knowledge to classify the bacterium.
22. Question 191. Type I hypersensitivities include
    1. Hay fever
    2. Hemolytic disease of newborns
    3. Celiac disease
    4. Graft rejection
23. Question 201. A vaccine that contains living, non-virulent strains of a microbe is called
    1. Acellular
    2. Attenuated
    3. Inactivated
    4. Toxoid
24. Question 211. The composition of a person’s microbiome may have an important influence on the occurrence of autoimmune disorders.
    1. True
    2. False
25. Question 221. Which test uses a medium that is both selective and differential for gram-negative lactose fermenters and non-lactose fermenters?
    1. MacConkey agar
    2. Mannitol salt agar
    3. Coagulase test
    4. Bile esculin hydrolysis
26. Question 231. The least numerous of all white blood cells that release histamine during inflammation and allergic reactions are
    1. Monocytes.
    2. Basophils.
    3. Lymphocytes.
    4. Eosinophils.
    5. Neutrophils.
27. Question 241. Medical Microbiology includes all but which of the following
    1. Pathology
    2. Immunology
    3. Epidemiology
    4. Phycology/algology
    5. Bacteriology
28. Question 251. The specificity of an antibody is due to
    1. The constant portions of the H and L chains.
    2. The L chains.
    3. The variable portions of the H and L chains.
    4. Its valence.
    5. The H chains.