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






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






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. At a pH of 8.6 the gamma globulins move toward the cathode - despite the fact that they are negatively charged. What is this phenomenon called?






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






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






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






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






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






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






11. Four children are admitted with malaise - anorexia - and abdominal pain. Further evaluations reveal mild anemia - erythrocyte basophilic stippling - and profound pica habits. Poisoning by which heavy metal is most likely responsible?






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






13. 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...






14. 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...






15. The preparation of a patient for standard tolerance testing should include...






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






17. Isoenzyme assays are preformed to improve...






18. The serum glucose concentration of a diabetic patient undergoing a 2-hour glucose tolerance test should return to the baseline (fasting level) after a minimum of...






19. A blood sample was received from the emergency room with a request for narcotic analysis. The request slip indicated that the patient (a known heroin addict) responded to naloxone administration. The serum was negative for morphine by EIA. What other






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






21. Magnesium carbonate is added in an iron binding capacity determination in order to...






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






23. In the liver - bilirubin is converted to...






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






25. A critically ill patient becomes comatose. The physician believes the coma is due to hepatic failure. The assay most helpful in this diagnosis is...






26. 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...






27. This serum constituent is unstable if a blood specimen is left standing at room temperature for 8 hours before processing






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






29. Malic dehydrogenase is added to the aspartate aminotransaminase (AST) reaction to catalyze the conversion of...






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






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






32. A patient has signs and symptoms suggestive of acromegaly. The diagnosis would be confirmed if the patient had...






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






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






35. When taken by a euthyroid individual - oral contraceptives containing estrogens will have this effects on the thyroid function studies






36. 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






37. 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?






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






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






40. 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...






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






42. In developing the reference for a new EIA for CEA - the range for the normal population was broader than that published by the vendor. Controls are acceptable with a narrow coefficient of variation. This may be explained by...






43. 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






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






45. In electrophoresis of serum proteins - arifacts at the application point are most frequently caused by...






46. 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...






47. The hemoglobin that is resistant to alkali (KOH) denaturation is...






48. This chemical determination may be of help in establishing the presence of seminal fluid






49. A common cause of a falsely increased LD1 fraction of lactic dehydrogenase is...






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