Which of the following characterizes reversed-phase liquid-liquid
chromatography?
Select one:
a. Mobile phase is nonpolar relative to the polar stationary phase
b. Mobile and stationary phases are nonpolar
c. Mobile and stationary phases are polar
d. Mobile phase is polar relative to the nonpolar stationary phase - ✔️
✔️d.
Mobile phase is polar relative to the nonpolar stationary phase
In what manner is the dye uptake by a sample following electrophoresis and
staining related to the sample concentration?
Select one:
a. Directly proportional
b. Inversely proportional
c. Linearly
d. Unequally - ✔️
✔️a. Directly proportional
Which ion is used in most analytical methods to determine urea?
Select one:
a. OH<sup>-</sup>
b. NH<sub>4</sub><sup>+</sup>
, c. CI<sup>-</sup>
d. Na<sup>+</sup> - ✔️
✔️b. NH<sub>4</sub><sup>+</sup>
Which compound comprises about 40-50% of total non-protein nitrogen?
Select one:
a. Uric acid
b. Urea
c. Creatine
d. Creatinine - ✔️
✔️b. Urea
The most common methods for uric acid measurement utilize uricase to
catalyze the oxidation of uric acid to which of the following?
Select one:
a. Phosphotungstic acid
b. Allantoin
c. Urea
d. Creatinine - ✔️
✔️b. Allantoin
The reference range of urobilinogen is
Select one:
a. 0.1-1.0 mg/dL every 2 hours.
b. 0.1-1.0 µmol/L every 2 hours.
c. 0.1-1.0 Ehrlich units every 2 hours.
d. 0.1-1.0 Babson units every 2 hours. - ✔️
✔c️. 0.1-1.0 Ehrlich units every 2
hours.
The reduction of oxaloacetate to malate by malate dehydrogenase is used in
the measurement of which enzyme?
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