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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. An acid cleaning solution for glassware consists of...






2. This elevates carboxyhemoglobin?






3. 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...






4. The most common type of congenital adrenal hyperplasia associated with increased plasma concentrations of 17 a-hydroxyprogesterone and increased urinary excretion of pregnanetriol is...






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






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






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






8. 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






9. In the assay of lactate dehydrogenase - this product is actually measured






10. 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






11. The following bilirubin results are obtained on a patient: Day 1: 4.3 mg/dL Day 4: 2.2 mg/dL Day 2: 4.6 mg/dL Day 5: 4.4 mg/dL Day 3: 4.5 mg/dL Day 6: 4.5 mg/dL - Given that the controls were within range each day - what is a probable explanation for






12. 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...






13. The biologically most active - naturally occuring androgen is...






14. The urea nitrogen concentration of a serum sample was measured as 15 mg/dL (atomic weights: carbon = 12 - oxygen = 16 - nitrogen = 14 - hydrogen = 1). The urea concentration of the same sample - in mg/dL - is...






15. Currently the most common method for specific identification and quantitation of serum barbiturates is...






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






17. This method offers the greatest sensitivity for HBsAg testing






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






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






20. While performing a serum lithium determination on a flame photometer with cesium as the internal standard - the technologist noticed that there was a flickering flame. The most probable cause of this problem is...






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. 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...






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






24. Which percentage of total serum calcium is nondiffusible protein bound?






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






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






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






28. Nephelometers measure light...






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






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






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






32. Bile acid concentrations are useful to assess...






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






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






35. The major fraction of organic iodine in the circulation is in the form of...






36. 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...






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






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






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






40. Pregnant women with symptoms of thirst - frequent urination - or unexplained weight loss should have this test performed?






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






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






43. Blood was collected in a serum separator tube from a patient who had been fasting since midnight. The time of collection was 7:00 AM. The laboratory test that should be re-collected is...






44. A patient with myeloproliferative disorder has the following values: Hgb = 13 g/dL Hct = 38% WBC = 30 x 10^3/uL Platelets = 1000 x 10^3/uL Serum Na+ = 140 mEq/L Serum K+ = 7 mEq/L The serum K+ should be confirmed by...






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






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






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






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






49. The nanometer is a measurement of...






50. A carbonate salt used to control manic-depressive disorders is...