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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. A true statement about high performance liquid chromatography (HPLC) is that it...






2. Aminotransferase enzymes catalyze the...






3. Gas chromatography with the nitrogen/phosphorus detector is the most commonly used technique for the analysis of...






4. The enzyme that exists chiefly in skeletal muscle - heart - and brain; is grossly elevated in active muscular dystrophy; and rises early in myocardial infarction is...






5. The test for adrenal cortical hyperfunction that has the greatest diagnostic sensitivity is measurement of...






6. Patients with Cushing's syndrome exhibit...






7. Quantitation of NA+ and K+ by ion-selective electrode is more rapid than flame photometry because...






8. Creatinine clearance is used to estimate the...






9. Upon completion of a run of cholesterol tests - the technician recognizes that the controls are not within the two standard deviations confidence range. What is the appropriate course of action?






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






11. The chemical composition of HDL- cholesterol corresponds to...






12. A common cause of a falsely increased LD1 fraction of lactic dehydrogenase is...






13. In electrophoresis of proteins - when the sample is placed in an electric field connected to a buffer of pH 8.6 - all of the proteins...






14. 4 mL of water is added to 1 mL of serum. This represents this serum dilutions






15. Serum haptoglobin...






16. A potentiometric electrode that measures an analyte that passes through a selectively premeable membrane and rapidly enters into an equilibrium with an electrolyte solution is...






17. This enzymes catalyzes the conversion of starch to glucose and maltose






18. Most drugs and intracellular metabolites measured by radioimmunoassay have molecular weights between 200 and 1000 and can be made immunogenic by...






19. Zinc protoporphyrin or free erythrocyte protoporphyrin measurements are useful to assess blood concentrations of...






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






21. Serum from a patient with metastatic carcinoma of the prostate was separated from the clot and stored at room temperature. The following results were obtained: Patient Reference Range Calcium: 10.8 mg/dL 8.8-10.3 mg/dL LD:420 U/L 50-150 U/L Acid phos






22. The method of choice for diagnosis of a protracted attack of porphyria is...






23. 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...






24. Ion selective electrodes are called selective rather than specific because they actually measure the...






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






26. In spectrophotometric determination - this is the formula for calculating the absorbance of a solution






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






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






29. The TRH (thyrotropin-releasing hormone) stimulation test is useful in assessing...






30. Gel filtration chromatography is used to separate...






31. Nephelometers measure light...






32. The following data were obtained from a cellulose acetate protein electrophoresis scan: Albumin area 75 units Gamma globulin area 30 units Total area 180 units Total protein 6.5 g/dL The gamma globulin content in g/dL is...






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






34. Serum and urine copper levels are assayed on a hospital patient with the following results: Patient Serum Cu: 58 ug/dL; Reference Value:70-140 ug/dL Patient Urine Cu: 83 ug/dL ; Reference Value: < 40 ug/dL This is most consistent with...

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35. The osmolality of a urine or serum specimen is measured by a change in the...






36. A stool specimen that appears black and tarry should be tested for the presence of...






37. 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?






38. The Henderson-Hasselbalch equation






39. 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...






40. Beriberi is associated with deficiency of...






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






42. Testing for the diagnosis of lead poisoning should include...






43. The normal concentration of proteins in cerebrospinal fluid - relative to serum protein - is...






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. Given the following results: Alkaline phosphatase Marked increase Aminotransferase Slight increase Aspartate aminotransferase Slight increase Alanine gamma-glutamyl transferase Marked increase This is most consistent with...






46. In performing a spinal fluid protein determination - the specimen is diluted 1 part spinal fluid to 3 parts saline to obtain a result low enough to measure. To calculate the protein concentration the result must be...






47. This wavelengths is within the ultraviolet rang.






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






49. This hemoglobin has glucose-6-phosphate on the amino-terminal valine of the beta chain?






50. The measurement of light scattered by particles in the sample is the principle of...