Microbiology and Pathology Quiz 7

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Question 1 of 20

1. Question

Which of the following cells is pathognomonic for Hodgkin lymphoma?

Non-Hodgkin cells
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Immature white blood cells
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Myelogenous cells
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Reed-Sternberg cells
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Plasma cells
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Question 2 of 20

2. Question

Each of the following are common signs or symptoms found in a patient with non-Hodgkin lymphoma (NHL) EXCEPT:

Night sweats
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Malaise
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Fatigue
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Weight gain
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Solid tumor masses in the cervical and supraclavicular region
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Question 3 of 20

3. Question

Each of the following statements regarding Burkitt lymphoma is true EXCEPT:

It has a close association with Epstein Barr virus (EBV), especially in African nations.
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It is a high-grade T-cell malignancy.
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A chromosomal change of t(8; 14) is noted on genetic studies.
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It is a form of non-Hodgkin lymphoma (NHL).
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Lymph nodes are often spared with this disease.
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Question 4 of 20

4. Question

Mycosis fungoides is a form of non-Hodgkin lymphoma (NHL) characterized by eczematoid-type skin lesions that progress to tumors. Which histological finding is characteristic of Mycosis fungoides?

Ewing sarcoma cells B
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Affected osteoid
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Atypical CD4 cells with cerebriform nuclei and Pautrier microabscesses
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Uncontrolled proliferation of plasma cells
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Proliferation of B cells in the bone marrow
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Question 5 of 20

5. Question

Each of the following statements is true of cell-mediated immunity EXCEPT:

It is responsible for type IV hypersensitivity reactions.
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It helps the body defend against parasites.
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It is important in transplant rejection.
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It involves NK cells and macrophages.
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It is predominately B-cell mediated.
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Question 6 of 20

6. Question

A 17-year-old male experiences excessive bleeding from a superficial cut during an IV line placement, along with a history of hematomas and epistaxis. Which X-linked secondary hemostatic disorder is this patient MOST likely affected by?

von Willebrand disease
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Hemophilia A
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Bernard-Soulier disease
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Thrombocytopenia
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Hemophilia C
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Question 7 of 20

7. Question

Each of the following statements with regard to von Willebrand disease is correct EXCEPT:

It is a qualitative platelet disorder.
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It involves dysfunction of the vWF glycoprotein, allowing adhesion of platelets to collagen.
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It affects both the platelet plug and the coagulation cascade.
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vWF functions independent of factor VIII.
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It is an autosomal dominant disorder.
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Question 8 of 20

8. Question

Which of the following is TRUE regarding Vitamin K deficiency?

Increased activity of clotting factors II, VII, IX, X
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Decreased Prothrombin Time (PT)
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No change in Partial Thromboplastin Time (PTT)
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Caused by malabsorption of fat
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Abnormal platelet count
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Question 9 of 20

9. Question

Each of the following statements regarding wound repair is true EXCEPT:

Secondary intention wound healing occurs when a sizeable gap exists between margins.
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A large extraction socket heals by primary intention.
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The inflammatory stage occurs immediately after tissue injury.
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Contact inhibition occurs when migrating epithelial wound margins meet.
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Healing by primary intention occurs at a faster rate than secondary intention.
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Question 10 of 20

10. Question

Each of the following is a topical antibiotic EXCEPT:

Neomycin
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Bacitracin
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Polymyxin
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Ofloxacin
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All of the above are topical antibiotics.
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Question 11 of 20

11. Question

Which of the following bacteria is a gram-positive coccus that commonly causes abscess formation, toxic shock syndrome, and scalded skin syndrome?

Staphylococcus aureus
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Streptococcus bovis
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Streptococcus viridans
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Staphylococcus saprophyticus
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Actinomyces israelii
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Question 12 of 20

12. Question

Each of the following antibiotics is correctly matched with its mode of action EXCEPT:

Macrolide—inhibits protein synthesis by binding 50S ribosomal subunit.
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Cephalosporin—inhibits cell-wall synthesis by blocking peptidoglycan cross-linking.
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Penicillin—inhibits cell-wall synthesis by blocking peptidoglycan cross-linking.
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Tetracycline—inhibits protein synthesis by binding 30S ribosomal subunit.
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Clindamycin—inhibits DNA gyrase.
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Question 13 of 20

13. Question

Which of the following is TRUE regarding the viral growth curve?

The eclipse period is when both virions and nucleic acid grow exponentially.
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Virions and viral nucleic acid have nearly an identical growth curve during the rise period.
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The rise period occurs first once a virus enters a cell.
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One virus normally takes days to double
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During the rise period, there is a decreased number of virions.
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Question 14 of 20

14. Question

Which of the following bacteria is most strongly associated with gingivitis caused by sex steroid fluctuation (e.g., pregnancy, puberty, oral contraceptive use)?

Lactobacillus casei
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Prevotella intermedia
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Streptococcus mutans
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Actinomyces viscosus
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Lactobacillus acidophilus
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Question 15 of 20

15. Question

Which component of the complement system functions to enhance phagocytosis (opsonization)?

C5a
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C6
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C8
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C9
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C3b
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Question 16 of 20

16. Question

A 55-year-old woman presents with dry mouth (xerostomia), dry eyes (keratoconjunctivitis), a butterfly rash on her face (systemic lupus erythematous), and rampant caries. If blood results show antinuclear antibodies, which disease is indicated?

Reiter syndrome
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Behcet syndrome
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Scleroderma
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Ankylosing spondylitis
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Sjögren syndrome
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Question 17 of 20

17. Question

What is the most common autoimmune disorder?

Sjögren syndrome
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Rheumatoid arthritis
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Lupus
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Polyarteritis nodosa
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Dermatomyositis
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Question 18 of 20

18. Question

Which of the following statements is FALSE with regard to the Stephan curve and salivary pH?

Nonfermentable carbohydrates cause a rapid decrease in salivary pH.
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It takes up to 40 minutes to recover normal salivary pH after eating sugar.
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Sucrose ingestion can greatly affect salivary pH.
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Normal salivary pH is around 7.0. E. Enamel begins to demineralize at a pH of 5.5.
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Question 19 of 20

19. Question

Which of the following chemical plaque control agents contains the highest alcohol content?

Total (sodium fluoride/triclosan)
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Gel-Kam (stannous fluoride)
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Listerine (phenolic/essential oil compound)
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Peridex (chlorhexidine gluconate)
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Scope (cetylpyridinium chloride)
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Question 20 of 20

20. Question

Which of the following statements is TRUE about the bacterial growth curve?

Cell growth plateaus during the stationary phase, demonstrating a lack of required nutrients.
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The initial phase is characterized by increased cell death.
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There is an exponential increase in bacterial growth during the log phase.
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There is decreased metabolic activity during the lag phase.
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The lag phase is characterized by a lack of required bacterial nutrients.
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Microbiology and Pathology Quiz 7

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