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






2. Characteristic of the Bence Jones protein that is used to distinguish it from other urinary proteins is its solubility...






3. If a drug has a half-life of 7 hours - how many doses given at 7-hour intervals does it usually take to achieve a steady state or plateau level?






4. This applies to cryoscopic osmometry






5. The definitive diagnosis of primary adrenal insufficiency requires demonstration of...






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






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






8. Aminotransferase enzymes catalyze the...






9. 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...






10. One international unit of enzyme activity is the amount of enzyme that - under specified reaction conditions of substrate concentration - pH - and temperature - causes utilization of substrate at the rate of...






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






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






14. If the correlation coefficient (r) of two variables is zero...






15. 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...






16. A psychiatric patient was experiencing sever depression - but responded to treatment with amitriptyline with no apparent side effects. A blood sample was sent to the laboratory for therapeutic monitoring. Which drug level would be MOST reflective of






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






18. The fast hemoglobin fraction is...






19. A reciprocal relationship exists between...






20. These enzymes of heme biosynthesis are inhibited by lead






21. Clinical assays for tumor markers are the most important for...






22. Unless blood gas measurements are made immediately after sampling - in vitro glycolysis of the blood causes a...






23. Nephelometers measure light...






24. 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...






25. The presence of this isoenzymes indicates acute myocardial damage






26. The osmolal gap is defined as measured Osm/kg minus the calculated Osm/kg. The average osmolal gap is near...






27. 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






28. The identification of Bence Jones protein is best accomplished by...






29. An electrophoretic separation of lactate dehydrogenase isoenzymes that demonstrates an elevation in LD-l and LD-2 in a "flipped" pattern is consistent with...






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






31. In monitoring glomerular function - this test has the highest sensitivity






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






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






34. Enzymes used in the diagnosis of acute pancreatitis?






35. A patient has the following results: Patient Values : Reference Values: Serum iron 250 ug/dL 60-150 ug/dL TIBC 350 ug/dL 300-35O ug/dL The best conclusion is that this patient has...






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






37. 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...






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






39. This elevates carboxyhemoglobin?






40. Rickets is associated with deficiency of...






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






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






43. The serum glucose concentration of a diabetic patient undergoing a 2-hour glucose tolerance test should return to the baseline (fasting level) after a minimum of...






44. A thick white turbid specimen was received in the laboratory labeled as pericardial fluid. A microscopic examination was performed - and the differential included 90% PMNs. The fluid is...






45. When separating serum proteins by cellulose acetate electrophoresis using veronal buffer at pH 8.6 - beta globulin migrates...






46. A serum sample was assayed for bilirubin at 10 AM and the result was 12 mg/dL. The same sample was retested at 3 PM. The result now is 8 mg/dL. The most likely explanation for this discrepancy is...






47. A 9-month-old boy from Israel has gradually lost the ability to sit up and develops seizures. He has an increased amount of a phospholipid called GM2-ganglioside in his neurons - and he lacks the enzyme hexosaminidase A in his leukocytes. These findi






48. A test request slip indicates that an acute porphyric attack is suspected clinically. Analysis should include...






49. Respiratory acidosis is described as a(n): ______ increase in CO2 decrease in pH






50. Serum concentrations of vitamin B12 are elevated in...