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






2. At blood pH 7.40 what is the ratio between bicarbonate and carbonic acid?






3. 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?






4. 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...






5. TSH is produced by the...






6. 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






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






8. This 2-hour postprandial glucose values demonstrates unequivocal hyperglycemia diagnostic for diabetes mellitus






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






10. About 90% of phenytoin is excreted in the urine as...






11. The TRH (thyrotropin-releasing hormone) stimulation test is useful in assessing...






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






13. A reciprocal relationship exists between...






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






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






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






17. The following laboratory results were obtained: Serum Calcium: Increased - Urine Calcium: Increased - Serum Phosphate: Decreased - Urine Phosphate: Increased Serum Alkaline Phosphatase: Normal or Increased These results are most compatible with...






18. Alkaline phosphatase Slight increase - Aminotransferase Marked increase - Aspartate aminotransferase Marked increase - Alanine gamma-glutamyl transferase Slight increase






19. In a normal individual - injection of thyrotropin-releasing hormone (TRH) causes an increase in blood concentrations of this hormone






20. 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...






21. Major actions of angiotensin II include...






22. Scurvy is associated with deficiency of...






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






24. This lipid results would be expected to be falsely elevated on a serum specimen from a nonfasting patient






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






26. 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...






27. 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...






28. Coulometry is used to measure...






29. This hemoglobin has glucose-6-phosphate on the amino-terminal valine of the beta chain?






30. 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...






31. An HPLC operator notes that the column pressure is too high - is rising too rapidly - and the recorder output is not producing normal peaks. The most probable cause of the problem is...






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






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






34. This wavelengths is within the ultraviolet rang.






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






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






37. Serum anion gap is increased in patients with...






38. 4 mL of water is added to 1 mL of serum. This represents this serum dilutions






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






40. A spectrophotometer is being considered for purchase by a small laboratory. This specification reflects the spectral purity of the instrument






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






42. 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?






43. The most widely used support medium for electrophoretic separation of lipoproteins is...






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






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






46. 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...






47. A blood creatinine value of 5.0 mg/dL is most likely to be found with this blood value?






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






49. 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






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