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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 biologically most active - naturally occuring androgen is...






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






3. This applies to cryoscopic osmometry






4. Specimens for blood gas determination should be drawn into a syringe containing...






5. TSH is produced by the...






6. The following bilirubin results are obtained on a patient: Day 1: 4.3 mg/dL Day 4: 2.2 mg/dL Day 2: 4.6 mg/dL Day 5: 4.4 mg/dL Day 3: 4.5 mg/dL Day 6: 4.5 mg/dL - Given that the controls were within range each day - what is a probable explanation for






7. This diseases results from a familial absence of high-density lioprotein






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






9. This steroid is an adrenal cortical hormone






10. 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?






11. The osmolal gap is defined as measured Osm/kg minus the calculated Osm/kg. The average osmolal gap is near...






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






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






14. A cardiac glycoside that is used in the treatment of congenital heart failure and arrhythmias by increasing the force and velocity of myocardial contraction is...






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






16. How many grams of sodium chloride are needed to prepare 1 L of 0.9% normal saline?






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






18. 4 mL of water is added to 1 mL of serum. This represents this serum dilutions






19. In automated methods utilizing a bichromatic analyzer - dual wavelengths are employed to...






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






21. Coulometry is used to measure...






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






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






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






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






26. This method employs a highly specific antibody to thyroxine






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






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






29. 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...






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






31. Serum haptoglobin...






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






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






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






35. 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...






36. 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...






37. The anion gap is useful for quality control of laboratory results for...






38. The normal concentration of proteins in cerebrospinal fluid - relative to serum protein - is...






39. The nanometer is a measurement of...






40. A course of instruction is being planned to teach laboratory employees to correct simple malfunctions in selected laboratory instruments. In writing the objectives for this course - this would be most appropriate?






41. 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?






42. This is a regulatory hormone.






43. Given the following results: Alkaline phosphatase Marked increase Aminotransferase Slight increase Aspartate aminotransferase Slight increase Alanine gamma-glutamyl transferase Marked increase This is most consistent with...






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






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






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






47. The Porter-Silber method (phenylhydrazine in alcohol and sulfuric acid) involves which part of the steroid molecule?






48. Amino acid associated with a sulfhydryl group






49. 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...






50. Regan isoenzyme has the same properties as alkaline phosphatase that originates in the...