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LABCE EXAM QUESTIONS AND ANSWERS
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LABCE EXAM QUESTIONS AND ANSWERS
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LABCE EXAM QUESTIONS AND ANSWERSThe relative centrifugal force of a centrifuge may not be affected by what? - Answers-
Time
Antigen processing is primarily accomplished by which cell type? - Answers-
Macrophages.
The concentration of sodium chloride in an isotonic solution is? - Answers- 0.85%
A kidney graft would have the best chance of survival post-transplantation if it were? -
Answers- HLA Identical, mixed lymphocyte culture (-), ABO identical
Micrococcus luteas - Answers- Bacitracin susceptible, resistant to furazolidone. GP
coccus.
What would happen as a result of hemodilution? - Answers- Low serum electrolyte
values
A normal hemoglobin molecule is comprised of: - Answers- four heme and hour globin
chains.
Which organisms are frequently associated with infective endocarditis? - Answers-
Staphlyococci, and streptococci
Why do so few patients transfused with un-crossmatched red cells in an emergency
experience a hemolytic transfusion reaction? - Answers- The incidence of unexpected
red cell antibodies is relatively low.
The measurement of 17-ketosteroids in urine is performed to assess primarily: -
Answers- Testes and adrenal cortex
Twelve weeks after onset of the disease, patients with uncomplicated acute hepatitis
usually will demonstrate which protein in their serum? - Answers- Anti-HBe
Toxic granulation and vacuoles in a neutrophil most likely represent? - Answers-
Septicemia
Bence-Jones proteinuria will not be found in which diseases?
A) macroglobulinemia
B) Pernicious anemia
C) Multiple Myeloma
D) Amyloidosis - Answers- Pernicious anemia
The most frequent cause of bacterial meningitis in older adults is: - Answers-
Streptococcus pneumoniae
, Xanthochromia in CSF is characteristic of: - Answers- Hemorrhage. Xanthochromia is
the pink, yellowish, or orange discoloration of the CSF mostly due to the presence of
RBC degradation (hemolysis)
What best describes high sensitivity CRP testing? - Answers- HS-CRP is a marker of
chronic inflammation and is measured to predict the risk of cardiovascular disease.
Rh antibodies generally: - Answers- React best at 37 degrees Celsius
The use of non-specific fluorescent dyes is the most specific method of measuring
amplicons in real-time PCR. T/F - Answers- False
Post-transfusion purport is characterized by: - Answers- Appearance of purport, platelet
count less than 10,000/uL, and mucousal membrane bleeding
How to differentiate between Listeria monocytogenes and Erysipelothrix rhusiophathiae:
- Answers- Listeria is motile at RT, hydrolyzes esculin, and is catalase positive.
Erysipelothrix is non-motile, does not hydrolyse esculin, and is catalase negative. Both
ferment glucose.
A pregnant female who was injected with RHG antenatally has a positive antibody
screen at delivery. The antibody has been confirmed as anti-D and reacts only in the
indirect anti globulin phase. Many laboratories consider reaction strength to be an
indicator of whether the anti-D is likely passive or immune. To be considered probably
passive, an anti-D reaction strength is typically less than or equal to which reaction
grade? - Answers- 2+
Adult Ascaris lumbricoides worms live in the: - Answers- Small intestine
What is not true of Real-Time RT-PCR? - Answers- It does not require the use of
reverse transcriptase.
The nitrite portion of the test strip can be used to: - Answers- Monitor antibiotic therapy,
detect a bladder infection in an early stage in pregnant women, screen individuals with
recurrent infections.
While ABO, Rh, Kell, Duffy, Kidd, and SsU are clinically significant, which antibodies
generally react at only the Coombs phase (AHG)? - Answers- Kell, Duffy, Kidd
Which serum protein shoes a decrease during an acute phase response? - Answers-
Albumin. Albumin is a negative acute phase protein since it is found in decreased levels
during acute phase responses. A1T, fibrinogen, and ceruloplasmin are all positive acute
phase proteins that are found in increased levels during an acute phase response.
Other positive proteins are alpha-1-acid glycoprotein, haptoglobin, C3, C4, C-reactive
protein, and serum amyloid
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