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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. This serum protein migrates with the beta-globulins on cellulose acetate at pH 8.6...






2. 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






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






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






5. This diseases results from a familial absence of high-density lioprotein






6. About 90% of phenytoin is excreted in the urine as...






7. A patient with malabsorption receives 25 g of d-xylose orally; during the subsequent 5-hour period - the urine excretion of d-xylose is less than 3 g. This would indicate...






8. This method offers the greatest sensitivity for HBsAg testing






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






10. 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?






11. Aminotransferase enzymes catalyze the...






12. In an internal standard flame photometer - the internal standard is used to...






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






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






15. The electrophoretic pattern of a plasma sample compared with a serum sample shows a...






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






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






18. 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






19. Thiis serum protein fraction is most likely to be elevated in patients with nephrotic syndrome?






20. In electrophoretic analysis - buffers...






21. 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...






22. Serum levels that define hypoglycemia in preterm or low birth weight infants are...






23. 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...






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






25. The following laboratory results were obtained: Serum Calcium: Increased - Urine Calcium: Increased - Serum Phosphate: Decreased - Urine Phosphate: Increased Serum Alkaline Phosphatase: Normal or Increased These results are most compatible with...






26. A 24-hour urine specimen (total volume = 1136 mL) is submitted to the laboratory for quantitative urine protein. Calculate the amount of protein excreted per day - if the total protein is 52 mg/dL.






27. The formula for coefficient of variation?






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






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






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






31. To ensure an accurate ammonia level result - the specimen should be...






32. Bromcresol purple at a pH of 5.2 is used in a colorimetric method to measure...






33. This electrolyte is the chief plasma cation whose main function is maintaining osmotic pressure






34. 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...






35. 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...






36. High levels of which lipoprotein class are associated with decreased risk of accelerated atherosclerosis?






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






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






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






40. This enzyme substrates for prostatic acid phosphatase determination results in the highest specificity






41. In a double-beam photometer - the additional beam is used to...






42. 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...






43. The general types of interference in atomic absorption spectrophotometry...






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






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






46. 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...






47. This 2-hour postprandial glucose values demonstrates unequivocal hyperglycemia diagnostic for diabetes mellitus






48. An increase in serum acetone is indicative of a defect in the metabolism of...






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






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






Can you answer 50 questions in 15 minutes?



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