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LABCE REVIEW QUESTIONS AND ANSWERS
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LABCE REVIEW QUESTIONS AND ANSWERS
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LABCE REVIEW QUESTIONS AND ANSWERSWhen performing an anti-human globulin (AHG) test, it is important to completely wash
the red cells because:
A) Washing eliminates concentrations of unbound antigens.
B) Washing prevents elution of cell-bound antibody.
C) Washing promotes false positive effects of rouleaux.
D) Washing prevents neutralization of the anti-human globulin (AHG) serum.
Feedback - Answers- D) Washing prevents neutralization of the anti-human globulin
(AHG) serum.
Feedback
What type of chemical is lithium?
A) An anionic metal
B) A synthetic salt
C) A cationic metal
D) A naturally-occurring salt - Answers- C) A cationic metal
This smear shows:
A) No abnormality
B) Howell-Jolly bodies
C) Basophilic stippling
D) Pappenheimer bodies - Answers- A) No abnormality
A urine sample is cloudy pink in appearance. The microscopic examination reveals the
presence of intact red blood cells. The term used to describe these findings is:
A) Oliguria
B) Hematuria
C) Myoglobinuria
D) Hemoglobinuria - Answers- B) Hematuria
Which of the following statements is true regarding hyposegmented neutrophils?
A) Hyposegmented neutrophils always indicate the presence of infection.
B) Nucleus may be round, peanut-shaped or bilobed.
C) Nucleus has 3 - 5 lobes.
,D) Hyposegmented neutrophils are an early indicator of megaloblastic anemia. -
Answers- B) Nucleus may be round, peanut-shaped or bilobed.
The addition of Lugol's Iodine to a direct and indirect wet prep is used to detect which of
the following protozoan stages?
A) Cysts
B) Eggs
C) Larvae
D) Trophozoites - Answers- A) Cysts
Which of the following cells are capable of producing antibodies?
A) Thrombocytes
B) Macrophages
C) Lymphocytes
D) Neutrophils - Answers- C) Lymphocytes
A technologist is having trouble differentiating between red blood cells, oil droplets, and
yeast cells on a urine microscopy. Acetic acid should be added to the sediment to:
A) Lyse the yeast cells
B) Lyse the red blood cells
C) Dissolve the oil droplets
D) Crenate the red blood cells - Answers- B) Lyse the red blood cells
When in the Fisher Projection, which carbon is used to determine if the molecule is in D
or L formation?
A) Anomeric carbon
B) First chiral carbon
C) Central Carbon
D) Penultimate carbon - Answers- D) Penultimate carbon
A bone biopsy from a jaw sent to a microbiology laboratory for culture grew out an
Actinomyces species. What would be the most probable contributing factor to this
infection?
A) Poor circulation
B) Poor oral hygiene
C) Break in skin
D) Pelvic infection - Answers- B) Poor oral hygiene
The accuracy of an immunoassay is its ability to discriminate between results that are
true positive and results that are true negative. Two parameters of test accuracy are
, specificity and sensitivity. Which of these statements apply to an immunoassay with high
specificity?
A) Accurately identifies the presence of disease
B) Accurately identifies the absence of disease
C) Has many false-positives
D) Has few false-negatives - Answers- B) Accurately identifies the absence of disease
What is a characteristic of a person who is weak D?
A) Types as D negative and produces anti-D when exposed to D antigen
B) Demonstrates a reduced number of D antigen sites on the surface of the red cell
C) Types as D positive and produces anti-D when exposed to D antigen
D) Someone who is defined as being D negative - Answers- B) Demonstrates a
reduced number of D antigen sites on the surface of the red cell
Which of the following proteins has the FASTEST electrophoretic mobility?
A) Albumin
B) Alpha globulins
C) Beta globulins
D) Gamma globulins - Answers- A) Albumin
Which of the following organisms is best visualized by use of a darkfield microscope?
A) Poxviridae
B) Entamoeba
C) Borrelia
D) Streptococcus - Answers- C) Borrelia
A technologist put five (5) tubes in a test tube rack and put 3 mL of diluent in each tube.
The tech then put 0.3 mL serum in the first tube and mixed it. Next, the tech then
transferred 1 mL of the mixture from the first tube to the second tube. This process was
carried on through tube number five (5). What is the dilution factor in tube number five?
A) 200
B) 300
C) 2816
D) 4872 - Answers- C) 2816
Feedback
The cumulative dilution factor in any tube in a dilution series is determined by
multiplying the dilution factors of all previous tubes in the series, and the calculation also
includes the tube in question.
Therefore, dilution factor (in a series) = tube #1's dilution factor x tube #2's dilution
factor...x tube #n's dilution factor.
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