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Chemistry NCA part 2 Exam Latest Update
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Chemistry NCA part 2 ExamLatest Update
Which of the following analytes can deteriorate when exposed to light?
A:Billirubin
B:calcium
C:cholesterol
D: glucose - Answer Billirubin
Which of the following collection tubes is the choice for the determination of glycated
hemoglobin?
A: Citrate tube
B: EDTA tube
C: Red/Marble top tube
D: Ammonium heparin tube - Answer EDTA
which of the following enzymes catalyzes the conversion of glucose to hydrogen
peroxide and gluconic acid?
A: Peroxidase
B:hexokinase
C: Glucose oxidase
D: Glucose 6-phosphate dehydrogenase - Answer Glucose oxidase
Which of the following constituents has the greatest effect on osmolality?
A: glucose
B:protein
C:sodium
D: urea - Answer sodium
When measuring serum bilirubin, the purpose of adding caffeine-sodium benzoate or
dyphylline is to?
, A: accelerate the reaction with unconjugated bilirubin
B: stop the reaction by destroying excess diazo reagent
C: enable azobilirubin formation with conjugated bilirubin
D: shift the wavelenght absorbed by azobilirubin for increased sensitivity - Answer
accelerate the reaction with unconjugated bilirubin
When iontophoresis is used to collect sweat for chloride analysis, pilocarpine is used to:
A: clean the skin area
B: complex with chloride
C: complete the circuit
D: induce sweat secretion - Answer induce sweat secretion
When using absorption spectrophotometry for calcium quantitation, lanthanum or
strontium is routinely added to each sample to?
A: minimize matrix interferences
B: prevent ionization from calcium atoms
C: avoid interferences from phosphate in the sample
D: reduce fluctuations from the hollow cathode lamp - Answer avoid interferences from
phosphate in the sample
Ion selective electrodes compare the voltage (potential) of the measuring electrode to
the ?
A: reference voltage
B: resistivity of the sample
C: conductivity of the sample
D: current required to establish the voltage - Answer reference voltage
Which of the following statements best describes the principle of pO2 measurement
used in blood gas analyzers?
A: H+ are generated by a reaction at the electrode surface
B: The amount of O2 oxidized to hydrogen peroxide is measured
C: the number of electrons used to reduce O2 is measured
D: A voltage between the measuring half-cell and a reference half-cell is determined -
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