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






2. 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?






3. 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...






4. How many grams of sodium chloride are needed to prepare 1 L of 0.9% normal saline?






5. 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...






6. A person suspected of having metabolic alkalosis would have these laboratory findings






7. Cocaine is metabolized to...






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






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






10. Technical problems encountered during the collection of an amniotic fluid specimen caused doubt as to whether the specimen was amniotic in origin. This procedure would establish that the fluid is amniotic in origin






11. 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...






12. The first step in analyzing a 24-hour urine specimen for quantitative urine protein is...






13. 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...






14. Detection of carriers of hereditary coproporphyria should include analysis of...






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






16. The different water content of erythrocytes and plasma makes true glucose concentrations in whole blood a function of the...






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






18. The buffer pH most effective at allowing amphoteric proteins to migrate toward the cathode in an electrophoretic system would be...






19. 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?






20. Acidosis and alkalosis are best defined as fluctuations in blood pH and CO2 content due to changes in...






21. This is a regulatory hormone.






22. This lipid results would be expected to be falsely elevated on a serum specimen from a nonfasting patient






23. In automated methods utilizing a bichromatic analyzer - dual wavelengths are employed to...






24. 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?






25. Amino acid associated with a sulfhydryl group






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






27. A course of instruction is being planned to teach laboratory employees to correct simple malfunctions in selected laboratory instruments. In writing the objectives for this course - this would be most appropriate?






28. This method offers the greatest sensitivity for HBsAg testing






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






30. 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...






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






32. An emphysema patient suffering from fluid accumulation in the alveolar spaves is likely to be in what metabolic state?






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






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






35. The function of the major lipid components of the very low density lipoproteins (VLDL) is to transport...






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






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






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






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






40. Stray light can be detected in a spectrophotometer by utilizing a...






41. 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...






42. The protein portion of an enzyme complex is called the...






43. 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...






44. The formula for calculating serum osmolality that incorporates a correction for the water content of plasma is...






45. 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...






46. 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






47. Following overnight fasting - hypoglycemia in adults is defined as a glucose of...






48. 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...






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






50. Lasting serum phosphate concentration is controlled primarily by the...