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LABCE LABORATORY OPERATIONS AND ANSWERS
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LABCE LABORATORY OPERATIONS AND ANSWERS
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LABCE PRACTICE EXAM QUESTIONS AND ANSWERSA soft, yellow to pale brown nodule was found growing around the hair shaft of an
individual from a tropical location. On direct microscopic examination, hyaline hyphae
with numerous rectangular arthroconidia were observed. The presence of arthroconidia
aid in differentiating this organism from other yeast. The most likely identification is: -
Answers- Trichosporon species
Which of the following is necessary for the absorption of Vitamin B12: - Answers-
Intrinsic factor
Storage lesion, or the biochemical changes in red blood cells during storage, will result
in: - Answers- Decreased plasma pH
What biosafety level (BSL) is required by the Centers for Disease Control and
Prevention (CDC) for working with Mycobacterium tuberculosis if there is a possibility
that aerosols might be released? - Answers- BSL 3
Bence-Jones proteinuria is associated with all of the following conditions EXCEPT: -
Answers- Pernicious anemia
What molecular technique is appropriate for HIV-1 genotyping? - Answers- Reverse
Transcriptase Polymerase Chain Reaction
The purpose of C3a and C5a, the split-products of the complement cascade, is to: -
Answers- Cause increased vascular permeability, contraction of smooth muscle, and
release of histamine from basophils.
Which one of the following is a true statement about Lupus Anticoagulant (LA)? -
Answers- LA is an immunoglobulin
A spectrophotometric scan of amniotic fluid may be valuable in the determination of
which of the following conditions: - Answers- Hemolytic disease of the newborn
Which EBV markers would be MOST likely positive for an individual who had infectious
mononucleosis nine years ago? - Answers- Only anti-VCA (IgG) and anti-Epstein-Barr
nuclear antigen (EBNA) are positive.
Which of the following would be considered most significant as it relates to serological
testing: - Answers- Rise of antibody titers is diagnostic
Host cells (e.g., white blood cells, epithelial cells) will appear what color on a properly
stained Gram stain? - Answers- Pink
The normal range for urine pH is: - Answers- 4.5 to 8.0
, In flow cytometry, the granularity of a cell is indicated by which of the following? -
Answers- Side scatter
The volume of urine recommended for centrifugation for a microscopic examination is: -
Answers- 10-15 mL
The characteristics of an acute phase protein include the following EXCEPT: - Answers-
Acute phase proteins are synthesized slowly in response to tissue injury.
While working at a blood bank laboratory, you hear chimes over the hospital
loudspeaker system announcing the birth of a baby. Thirty minutes later, you receive a
cord blood specimen that you identify as O positive. You previously received the
mother's specimen and she was O negative with a negative antibody screen. What is
the next action? - Answers- Perform a fetal blood screen
A patient admitted to the hospital for ongoing fever produces the following laboratory
results:
RBC count: 3.56 x 1012/L
WBC count: 57.5 x 109/L
Platelet count: 375,000/uL
Differential count: 3 blasts, 10 myelocytes, 6 metamyelocytes, 12 bands, 64 segs, 4
lymphocytes, and 1 monocyte
LAP score = 155.
Which of the following conditions correlates closely with this patient's results? -
Answers- Leukemoid reaction
All of the following are associated with HELLP syndrome EXCEPT: - Answers- Elevated
lipid levels
Each of the following hypothalamic hormones is correctly matched with the anterior
pituitary hormone that it releases EXCEPT: - Answers- GHRH --> Oxytocin
All of the following are included in a quality control program, EXCEPT? - Answers-
Protocol to prove patient results are correct
In which of the following cases should Rh Immune Globulin (RhIG) be given? -
Answers- Topic pregnancy
Given the following information, calculate the results in mg/24 hrs for a 24-hour urine
protein.Total volume for 24 hours = 2,400 mL
Urine protein = 2.7 mg/dL - Answers- 2.7 mg/dL X 2400 mL/24 hr X 1 dL/100 mL
= 64.8 mg/24 hr
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