CSMLS EXAM PRACTICE: CANADIAN SOCIETY FOR MEDICAL LABORATORY SCIENCE, 2025/2026 WITH CORRECT/ACCURATE ANSWERS

CSMLS EXAM PRACTICE: CANADIAN
SOCIETY FOR MEDICAL LABORATORY
SCIENCE, 2025/2026 WITH
CORRECT/ACCURATE ANSWERS
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KEY AREAS TESTED
 Hematology
 Clinical Chemistry
 Transfusion Science:
 Microbiology
 Histology/Histotechnology
 General laboratory practices
 Professionalism

CANADIAN SOCIETY FOR MEDICAL
LABORATORY SCIENCE

Which is the detector of choice for nephelometers?
Select one:
a. diode array
b. photomultiplier tube
c. gas photodiode
d. LED - CORRECT ANSWERS-b


Which statement regarding turbidimetry is NOT correct?
Select one:
a. light scattered by solutes in the solution at 180° from the incident light
is measured by a photon detector

,b. the measurement of light is made at right angles to the incident light
c. scattered light is directly proportional to the number of particles in
solution
d. measures the amount of incident light blocked by particles - CORRECT
ANSWERS-b


What is the effect on the colligative properties when you increase the
number of particles in the solution?
Select one:
a. Increases the boiling point, increases the freezing point
b. Increases the boiling point, increases the vapor pressure
c. Decreases the boiling point, increases the freezing point,
d. Decreases the freezing point, decreases the vapor pressure - CORRECT
ANSWERS-d
- increase boiling point
- decrease freezing point
- decrease vapor pressure
- increase osmotic pressure


What is the definition of retention factor (Rf) in thin layer
chromatography?
Select one:
a. Ratio of distance moved by the unknown solute to distance moved by
the solvent in the mobile phase
b. Rate of movement of the mobile phase through adsorbant compared
with standards and controls
c. Measurement in centimeters of the distance the solute moved in the
mobile phase from the point of application
d. Distance moved by the mobile phase front from the point of application
compared with a control - CORRECT ANSWERS-a

,What is quenching?
Select one:
a. a type of resonant fluorescence
b. an analytical procedure for determining fluorescent compounds.
c. the loss of fluorescent intensity which produces falsely decreased
patient results.
d. the loss of fluorescent intensity which produces falsely increased
patient results. - CORRECT ANSWERS-c


What will cause false values when using nephelometric analysis?
Select one:
a. absorption by a closely related atomic species
b. excess analyte in the antigen/antibody reaction
c. hemolyzed sample
d. too much fluorophore in the analyte/fluorescing compound mixture -
CORRECT ANSWERS-b


What measurement describes a current flow between two non-polarized
electrodes with a known electrical potential?
Select one:
a. amperometry
b. conductometry
c. coulometry
d. potentiometry - CORRECT ANSWERS-b


What does aldosterone secretion lead to?
Select one:
a. hypotension
b. increased ECF (extracellular fluid) volume
c. increased serum potassium
d. none of the above - CORRECT ANSWERS-b

, Which of these factors DO NOT influence the rate of an enzyme reaction?
Select one:
a. enzyme concentration
b. substrate concentration
c. cofactors
d. nomenclature - CORRECT ANSWERS-d


Which statement regarding serum urea is correct?
Select one:
a. is elevated in prerenal and renal failure
b. it is not reabsorbed by the renal tubules
c. high levels can result from necrotic liver disease
d. levels are independent of diet - CORRECT ANSWERS-a


Which of the following dyes is the most specific for the measurement of
albumin?
Select one:
a. tetrabromosulfophthalein
b. bromcresol green
c. bromcresol purple
d. tetrabromphenol blue - CORRECT ANSWERS-c


Which of the following lipid results would be expected to be falsely
elevated on a serum specimen from a non-fasting patient?
Select one:
a. Cholesterol
b. HDL
c. LDL
d. Triglyceride - CORRECT ANSWERS-d