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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. 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...






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






3. 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






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






5. TSH is produced by the...






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






7. 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






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






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






10. The enzyme that exists chiefly in skeletal muscle - heart - and brain; is grossly elevated in active muscular dystrophy; and rises early in myocardial infarction is...






11. In performing a spinal fluid protein determination - the specimen is diluted 1 part spinal fluid to 3 parts saline to obtain a result low enough to measure. To calculate the protein concentration the result must be...






12. This is a regulatory hormone.






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






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






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






16. A fasting serum sample from an asymptomatic 43-year-old woman is examined visually chemically with the following results: Initial appearance of serum: Milky Appearance of serum after overnight refrigeration: Cream layer over turbid serum Triglyceri






17. 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...






18. Which percentage of total serum calcium is nondiffusible protein bound?






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






20. Fluctuation of the needle on a coulometric type titrator is most probably due to...






21. A one MOLAL solution is equivalent to...






22. The primary function of serum albumin in the peripheral blood is to...






23. This is a characteristic shared by lactate dehydrogenase - malate dehydrogenase - isocitrate dehydrogenase - and hydroxybutyrate dehydrogenase?






24. 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?






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






26. When myocardial infarction occurs - the first enzyme to become elevated is...






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






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






29. In respiratory acidosis - a compensatory mechanism is the increase in...






30. Serum and urine copper levels are assayed on a hospital patient with the following results: Patient Serum Cu: 58 ug/dL; Reference Value:70-140 ug/dL Patient Urine Cu: 83 ug/dL ; Reference Value: < 40 ug/dL This is most consistent with...

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






32. Major actions of angiotensin II include...






33. A 68-year-old man arrives in the emergency room with a glucose level of 722 mg/dL and serum acetone of 4+ undiluted. An arterial blood gas from this patient is likely to indicate...






34. In monitoring glomerular function - this test has the highest sensitivity






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






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






37. This wavelengths is within the ultraviolet rang.






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






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






40. This would be an example of a glucose-specific colorimetric method






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






42. The relative migration rate of proteins on cellulose acetate is based on...






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






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






45. Sixty to seventy-five percent of the plasma cholesterol is transported by...






46. A patient with glomerulonephritis would present the following serum results...






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






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






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






50. 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...