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






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






3. 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...






4. Enzymes used in the diagnosis of acute pancreatitis?






5. 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






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






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






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






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






10. 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...






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






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






13. Isoenzyme assays are preformed to improve...






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






15. Amniotic fluid submitted for a lecithin/sphingomyelin (US) ratio has been left in a brown container since the night before. You would expect...






16. Blood specimens for digoxin assays should be obtained between 8 hours or more after drug administration because...






17. 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...






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






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






20. Turbidity in serum suggests elevation of...






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






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






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






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






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






26. 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...






27. This hemoglobin has glucose-6-phosphate on the amino-terminal valine of the beta chain?






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






29. 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...






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






31. 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?






32. Measurement of total T4 by competitive protein binding or displacement is based on the specific binding properties of...






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






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






35. This steroid is an adrenal cortical hormone






36. The chemical composition of HDL- cholesterol corresponds to...






37. An HPLC operator notes that the column pressure is too high - is rising too rapidly - and the recorder output is not producing normal peaks. The most probable cause of the problem is...






38. Aminotransferase enzymes catalyze the...






39. 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...






40. A 45-year-old woman has a fasting serum glucose concentration of 95 mg/dL and a 2-hour postprandial glucose concentration of 105 mg/dL. The statement that best describes this patient's fasting serum glucose concentration is...






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






42. A common cause of respiratory alkalosis is...






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






44. Lithium therapy is widely used in the treatment of...






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






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






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






49. In competitive inhibition of an enzyme reaction the...






50. A serum potassium is 19.5 mg/100 mL. This value is equal to how many mEq/L (MW of K = 39)?







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