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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 urea nitrogen concentration of a serum sample was measured as 15 mg/dL (atomic weights: carbon = 12 - oxygen = 16 - nitrogen = 14 - hydrogen = 1). The urea concentration of the same sample - in mg/dL - is...






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






3. Phenobarbital is a metabolite of...






4. 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...






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






6. Maple syrup urine disease is characterized by an increase in this urinary amino acids






7. Rickets is associated with deficiency of...






8. Kernicterus is an abnormal accumulation of bilirubin in...






9. A patient with malabsorption receives 25 g of d-xylose orally; during the subsequent 5-hour period - the urine excretion of d-xylose is less than 3 g. This would indicate...






10. The enzyme present in almost all tissues that may be separated by electrophoresis into five components is...






11. 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...






12. Technical problems encountered during the collection of an amniotic fluid specimen caused doubt as to whether the specimen was amniotic in origin. This procedure would establish that the fluid is amniotic in origin






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






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






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






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






17. 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...






18. 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






19. Serum from a patient with metastatic carcinoma of the prostate was separated from the clot and stored at room temperature. The following results were obtained: Patient Reference Range Calcium: 10.8 mg/dL 8.8-10.3 mg/dL LD:420 U/L 50-150 U/L Acid phos






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






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






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






23. This calcium procedure utilizes lanthanum chloride to emliminate iterfering substances






24. A patient with myeloproliferative disorder has the following values: Hgb = 13 g/dL Hct = 38% WBC = 30 x 10^3/uL Platelets = 1000 x 10^3/uL Serum Na+ = 140 mEq/L Serum K+ = 7 mEq/L The serum K+ should be confirmed by...






25. If the correlation coefficient (r) of two variables is zero...






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






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






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






29. The chemical composition of HDL- cholesterol corresponds to...






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






31. Enzymes used in the diagnosis of acute pancreatitis?






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






33. The concentration of serum carotene is affected MOST by...






34. 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...






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






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






37. 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






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






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






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






41. This disease is associated with the greatest elevation of lactate dehydrogenase isoenzyme 1?






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






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






44. A 21-year-old man with nausea - vomiting - and jaundice has the following laboratory findings: Total serum bilirubin level: 8.5 mg/dL (normal - 0-1.0) Conjugated serum bilirubin level: 6.1 mg/dL (normal - 0-0.5) Urine urobilinogen: Increased Fecal u






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






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






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






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






49. While performing a serum lithium determination on a flame photometer with cesium as the internal standard - the technologist noticed that there was a flickering flame. The most probable cause of this problem is...






50. One means of checking a spectrophotometer wavelength calibration in the visible range is by using a...







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