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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. 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...






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






3. 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...






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






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






6. Assay of transketolase activity in blood is used to detect deficiency of...






7. The extent to which measurements agree with or approach the true value of the quantity being measured is referred to as...






8. A reciprocal relationship exists between...






9. Bioavailability of a drug refers to the...






10. A fresh urine sample is received for "porphyrins" or "porphyria" without further information or specifications. Initial analysis should include...






11. The biuret reaction for the analysis of serum protein depends on the number...






12. Before unconjugated bilirubin can react with Ehrlich's diazo reagent - this must be added






13. 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...






14. 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...






15. In amniotic fluid - the procedure used to detect Rh isosensitization is...






16. Serum levels that define hypoglycemia in preterm or low birth weight infants are...






17. Which two conditions can "physiologically" elevate serum alkaline phosphatase?






18. The following data were obtained on amniotic fluid from a gestation of 36 weeks' duration by menstrual dates: L/S = 2 Phosphatidyl glycerol not present This can be concluded from these data?






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






20. Scurvy is associated with deficiency of...






21. The reason carbon monoxide is so toxic is because it...






22. The methodology based on the amount of energy absorbed by a subtance as a function of its concentration and using a specific source of the same material as the substance analyzed is...






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






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






25. 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...






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






27. 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?






28. 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...






29. The presence of this isoenzymes indicates acute myocardial damage






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






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






32. Coulometry is used to measure...






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






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






35. A potassium level of 6.8 mEq/L is obtained. Before reporting the results - the first step the technologist should take is to...






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






37. 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...






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






39. 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...






40. Blood received in the laboratory for blood gas analysis must meet these requirements






41. Ion selective electrodes are called selective rather than specific because they actually measure the...






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






43. This is a regulatory hormone.






44. Bromcresol purple at a pH of 5.2 is used in a colorimetric method to measure...






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






46. 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






47. The most specific enzyme test for acute pancreatitis is...






48. TSH is produced by the...






49. Analysis of erythrocytes for uroporphyrinogen I synthetase detects...






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