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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 spectrophotometer is being considered for purchase by a small laboratory. This specification reflects the spectral purity of the instrument






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






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






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






5. An electrode has a silver/silver chloride anode and a platinum wire cathode. It is suspended in KCl solution and separated from the blood to be analyzed by a selectively permeable membrane. Such an electrode is used to measure...






6. 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...






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






8. A 68-year-old man arrives in the emergency room with a glucose level of 722 mg/dL and serum acetone of 4+ undiluted. An arterial blood gas from this patient is likely to indicate...






9. A cardiac glycoside that is used in the treatment of congenital heart failure and arrhythmias by increasing the force and velocity of myocardial contraction is...






10. The most widely employed screening technique for drug abuse is...






11. This disease is associated with the greatest elevation of lactate dehydrogenase isoenzyme 1?






12. In developing the reference for a new EIA for CEA - the range for the normal population was broader than that published by the vendor. Controls are acceptable with a narrow coefficient of variation. This may be explained by...






13. In the fasting state - the arterial and capillary blood glucose concentration varies from the venous glucose concentration by approximately how many mg/dL?






14. Blood samples were collected at the beginning of an exercise class and after 30 minutes of aerobic activity. This would be most consistent with the postexercise sample






15. Which blood gas electrode is composed of calomel and glass?






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






17. 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?






18. 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...






19. In amniotic fluid - the procedure used to detect Rh isosensitization is...






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






21. Most chemical methods for determining total protein utilize this reaction?






22. In the atomic absorption method for calcium - lanthanum is used...






23. When the exact concentration of the solute of a solution is known and is used to evaluate the concentration of an unknown solution - the known solution is...






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






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






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






27. Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) are both elevated in this disease






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






29. A low concentrarion of serum phosphorus is commonly found in...






30. Measurement of total T4 by competitive protein binding or displacement is based on the specific binding properties of...






31. 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...






32. The enzyme present in almost all tissues that may be separated by electrophoresis into five components is...






33. A patient with glomerulonephritis would present the following serum results...






34. 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






35. 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?






36. Most most likely to be ordered in addition to serum calcium to determine the cause of tetany?






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






38. A condition in which erythrocyte protoporphyrin is increased is...






39. 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...






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






41. 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...






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






43. The expected blood gas results for a patient in chronic renal failure would match the pattern of...






44. A 45-year-old woman has a fasting serum glucose concentration of 95 mg/dL and a 2-hour postprandial glucose concentration of 105 mg/dL. The statement that best describes this patient's fasting serum glucose concentration is...






45. The following blood gas results were obtained: pH : 7.18 PO2: 86 mm Hg PCO2: 60 mm Hg O2 saturation: 92% HCO3-: 21 mEq/L TCO2: 23 mEq/L Base excess: -8.0 mEq/L The patient's results are compatible with...






46. The selectivity of an ion-selective electrode is determined by the...






47. A pH of 7.0 represents a H+ concentration of...






48. This method offers the greatest sensitivity for HBsAg testing






49. Serum haptoglobin...






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