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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. TSH is produced by the...






2. 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...






3. 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






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






5. 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...






6. Isoenzyme assays are preformed to improve...






7. 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...






8. 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...






9. 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...






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






11. When separating serum proteins by cellulose acetate electrophoresis using veronal buffer at pH 8.6 - beta globulin migrates...






12. A patient is admitted with biliary cirrhosis. If a serum protein electrophoresis is preformed - these globulin fractions will be most elevated?






13. The buffering capacity of blood is maintained by a reversible exchange process between bicarbonate and...






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






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






16. A blood creatinine value of 5.0 mg/dL is most likely to be found with this blood value?






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






18. The following five sodium control values (mEq/L) were obtained:140 - 135 - 138 - 140 - 142Calculate the coefficient of variation.






19. The following laboratory results were obtained on arterial blood: Sodium 136 mEq/L pH 7.32 Potassium 4.4 mEq/L PCO2 79 mm Hg Chloride 92 mEq/L Bicarbonate 40 mEq/L These results are most compatible with...






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






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






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






23. 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?






24. Maple syrup urine disease is characterized by an increase in this urinary amino acids






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






26. 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






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






28. The Henderson-Hasselbalch equation






29. What specimen preparation is commonly used to perform the alkaline phosphatase isoenzyme determination?






30. A 21-year-old man with nausea - vomiting - and jaundice has the following laboratory findings: Total serum bilirubin level: 8.5 mg/dL (normal - 0-1.0) Conjugated serum bilirubin level: 6.1 mg/dL (normal - 0-0.5) Urine urobilinogen: Increased Fecal u






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






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






33. The glucose level in normal peritoneal fluid should be...






34. A 9-month-old boy from Israel has gradually lost the ability to sit up and develops seizures. He has an increased amount of a phospholipid called GM2-ganglioside in his neurons - and he lacks the enzyme hexosaminidase A in his leukocytes. These findi






35. 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.






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






37. The anticonvulsant used to control tonic-clonic (grand mal) seizures is...






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






39. 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?






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






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






42. Rickets is associated with deficiency of...






43. As part of a hyperlipidemia screening program - the following results were obtained on a 25 year old woman 6 hours after eating:Triglycerides = 260 mg/dLCholesterol = 120 mg/dL - This is the BEST interpretation of these results?






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






45. This wavelengths is within the ultraviolet rang.






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






47. 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?






48. 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...






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






50. The main reason for suboptimal drug levels in therapeutic drug monitoring is...