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






2. The most widely used support medium for electrophoretic separation of lipoproteins is...






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






4. An automated CK assay gives a reading that is above the limits of linearity. A dilution of the serum sample is made by adding 1 mL of serum to 9 mL of water. The instrument now rew 350 U/L. The correct report on the undiluted serum should be...






5. Oligoclonal bands are present on electrophoresis of concentrated CSF and also on concurrently tested serum of the same patient. The proper interpretation is...






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






7. 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?






8. A patient in her 33rd week of pregnancy is hospitalized with toxemia. Her doctor would like to deliver the baby early because the toxemia is becoming more severe. The baby's best chance of delivery without respiratory distress due to lung immaturity






9. This method employs a highly specific antibody to thyroxine






10. A chemiluminescent EIA...






11. A 2-year-old child with a decreased serum T4 is described as being somewhat dwarfed - stocky - overweight - and having coarse features. Of the following - the most informative additional laboratory test would be the serum...






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






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






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






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






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






17. A 25-year-old man became nauseated and vomited 90 minutes after receiving a standard 75-g carbohydrate dose for an oral glucose tolerance test. The best course of action is...






18. A patient had the following serum results: Na+ 140 mEq/L K+ 4.0 mEq/L Glucose 95 mg/dL BUN 10 mg/dL Which osmolality is consistent with these results?






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






20. In the immunoinhibition phase of the CK-MB procedure...






21. This condition does decrease activity of glucuronyl transferase result in increased unconjugated bilirubin and kernicterus in neonates






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






23. Total iron-binding capacity measures the serum iron transporting capacity of...






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






25. 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






26. 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?






27. In the liver - bilirubin is converted to...






28. 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...






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






30. Specimens for blood gas determination should be drawn into a syringe containing...






31. The formula for calculating the amount of moles of a chemical?






32. Kernicterus is an abnormal accumulation of bilirubin in...






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






34. Alkaline phosphatase Slight increase - Aminotransferase Marked increase - Aspartate aminotransferase Marked increase - Alanine gamma-glutamyl transferase Slight increase






35. 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






36. 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...






37. A new method is being evaluated. A recovery experiment is performed with the following results: 0.9 mL serum sample + 0.1 mL H20 = 89 mEq/L 0.9 mL serum sample + 0.1 mL analyte std. @ 800 mEq/L = 161 mEq/L The percent recovery of the added analyt






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






39. Estrogen and progesterone receptor assays are useful in assessing prognosis in...?






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






41. An automated method for measuring chloride that generates silver ions in the reaction is...






42. The Porter-Silber method (phenylhydrazine in alcohol and sulfuric acid) involves which part of the steroid molecule?






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






44. 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...






45. Before unconjugated bilirubin can react with Ehrlich's diazo reagent - this must be added






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






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






48. 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...






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






50. The extent to which measurements agree with or approach the true value of the quantity being measured is referred to as...