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Chemistry Certification

Subject : certifications
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Ion selective electrodes are called selective rather than specific because they actually measure the...






2. In thin layer chromatography - the Rf value for a compound is given by the...






3. Given the following values:100;120;150;140;130;What is the mean?






4. The unit of measure for a standard solution is...






5. Cerebrospinal fluid for glucose assay should be...






6. This applies to cryoscopic osmometry






7. This would be an example of a glucose-specific colorimetric method






8. A critically ill patient becomes comatose. The physician believes the coma is due to hepatic failure. The assay most helpful in this diagnosis is...






9. Diagnostic specificity is defined as the percentage of individuals...






10. The direction in which albumin migrates (ie - toward anode or cathode) during electrophoretic separation of serum proteins - at pH 8.6 - is determined by...






11. The main reason for suboptimal drug levels in therapeutic drug monitoring is...






12. This 2-hour postprandial glucose values demonstrates unequivocal hyperglycemia diagnostic for diabetes mellitus






13. Upon development of a thin layer chromatogram for the drug analysis - all drug spots (including the standards) had migrated with the solvent front. The most probable cause for this would be...






14. The formula for calculating absorbance given the percent transmittance (%T) of a solution






15. Thiis serum protein fraction is most likely to be elevated in patients with nephrotic syndrome?






16. Calcium concentration in the serum is regulated by...






17. The most specific enzyme test for acute pancreatitis is...






18. The most consistent analytical error involved in the routine determination of HDLcholesterol is caused by...






19. This is a glycolytic enzyme that catalyzes the cleavage of fructose-1 - 6-diphosphate to glyceraldehyde-3-phosphate and dihydroxyacetone phosphate






20. Blood received in the laboratory for blood gas analysis must meet these requirements






21. An Rf value of 0.5 in thin-layer chromatography means...






22. One means of checking a spectrophotometer wavelength calibration in the visible range is by using a...






23. The following results were obtained in a creatinine clearance evaluation: Urine concentration 84 mg/dL Urine volume 1440 mL/24 hr Serum concentration 1.4 mg/dL Body surface area 1.60 m2 (average = 1.73 m2) The creatinine cle~trance in mL/min is...






24. This serum constituent is unstable if a blood specimen is left standing at room temperature for 8 hours before processing






25. The concentration of serum carotene is affected MOST by...






26. Certain enzymes are activated to metabolize drugs as a result of another drug action. This is referred to as...






27. The formula for calculating serum osmolality that incorporates a correction for the water content of plasma is...






28. The protein portion of an enzyme complex is called the...






29. Assay of transketolase activity in blood is used to detect deficiency of...






30. A serum sample for acid phosphatase determination is best prepared for room temperature storage by...






31. In electrophoretic analysis - buffers...






32. Regan isoenzyme has the same properties as alkaline phosphatase that originates in the...






33. Bioavailability of a drug refers to the...






34. Four children are admitted with malaise - anorexia - and abdominal pain. Further evaluations reveal mild anemia - erythrocyte basophilic stippling - and profound pica habits. Poisoning by which heavy metal is most likely responsible?






35. The principle of the occult blood test depends on the...






36. Sixty to seventy-five percent of the plasma cholesterol is transported by...






37. In electrophoresis of serum proteins - arifacts at the application point are most frequently caused by...






38. Following overnight fasting - hypoglycemia in adults is defined as a glucose of...






39. After a difficult venipuncture requiring prolonged application of the tourniquet - the serum K+ was found to be 6.8 mEq/L. The best course of action is to...






40. Spectrophotometers isolate a narrow band pass by means of...






41. Phenobarbital is a metabolite of...






42. A 45-year-old woman complains of fatigue - heat intolerance - and hair loss. Serum thyroxine and 125I-T3 resin uptake are abnormally low. What test would confirm that this is a pituitary deficiency?






43. In using ion-exchange chromatographicbmethods - falsely increased levels of Hgb A1c will be demonstrated in presence of...






44. A blood gas sample was sent to the lab on ice - and a bubble was present in the syringe. The blood had been exposed to room air for at least 30 minutes. The following change in blood gases occurred...






45. The most heat labile fraction of alkaline phosphatase is obtained from...






46. A sweat chloride result of 55 mEq/L and a sweat sodium of 52 mEq/L were obtained ona patient who has a history of respiratory problems. The bestc interpretation of these results is...






47. This serum protein migrates with the beta-globulins on cellulose acetate at pH 8.6...






48. Serum anion gap is increased in patients with...






49. The primary function of serum albumin in the peripheral blood is to...






50. In a normal individual - injection of thyrotropin-releasing hormone (TRH) causes an increase in blood concentrations of this hormone