Test your basic knowledge |

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. 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...






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






3. The direction in which albumin migrates (ie - toward anode or cathode) during electrophoretic separation of serum proteins - at pH 8.6 - is determined by...






4. Estrogen and progesterone receptor assays are useful in assessing prognosis in...?






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






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






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






8. The method of choice for diagnosis of a protracted attack of porphyria is...






9. 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?






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






11. A true statement about high performance liquid chromatography (HPLC) is that it...






12. The biologically most active - naturally occuring androgen is...






13. The expected blood gas results for a patient in chronic renal failure would match the pattern of...






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






15. The principle of the occult blood test depends on the...






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






17. The major fraction of organic iodine in the circulation is in the form of...






18. 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...






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






20. Phenobarbital is a metabolite of...






21. 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...






22. The ability of a procedure to measure only the component(s) it claims to measure is called...






23. A person suspected of having metabolic alkalosis would have these laboratory findings






24. This is a regulatory hormone.






25. 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...






26. Most automated blood gas analyzers directly measure...






27. TSH is produced by the...






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






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






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






31. Pregnant women with symptoms of thirst - frequent urination - or unexplained weight loss should have this test performed?






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






33. In the immunoinhibition phase of the CK-MB procedure...






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






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






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






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






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






39. The first step to be taken when attempting to repair a piece of electronic equipment is...






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






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






42. Currently the most common method for specific identification and quantitation of serum barbiturates is...






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






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






45. The most important buffer pair in plasma is the...






46. A sweat chloride result of 55 mEq/L and a sweat sodium of 52 mEq/L were obtained ona patient who has a history of respiratory problems. The bestc interpretation of these results is...






47. Most drugs and intracellular metabolites measured by radioimmunoassay have molecular weights between 200 and 1000 and can be made immunogenic by...






48. In electrophoretic analysis - buffers...






49. 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?






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