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. The most consistent analytical error involved in the routine determination of HDLcholesterol is caused by...






2. 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...






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






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






5. 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?






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






7. This method offers the greatest sensitivity for HBsAg testing






8. Respiratory acidosis is described as a(n): ______ increase in CO2 decrease in pH






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






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






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






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






13. 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...






14. To ensure an accurate ammonia level result - the specimen should be...






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






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






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






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






19. A new method is being evaluated. A recovery experiment is performed with the following results: 0.9 mL serum sample + 0.1 mL H20 = 89 mEq/L 0.9 mL serum sample + 0.1 mL analyte std. @ 800 mEq/L = 161 mEq/L The percent recovery of the added analyt






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






21. The T3 resin uptake test is a measure of...






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






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






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






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






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






27. This is a regulatory hormone.






28. In the sweat test - the sweating stimulant is introduced to the skin by application of...






29. 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...






30. Serum haptoglobin...






31. Cerebrospinal fluid for glucose assay should be...






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






33. The formula for coefficient of variation?






34. Oligoclonal bands are present on electrophoresis of concentrated CSF and also on concurrently tested serum of the same patient. The proper interpretation is...






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






36. A 25-year-old man became nauseated and vomited 90 minutes after receiving a standard 75-g carbohydrate dose for an oral glucose tolerance test. The best course of action is...






37. A patient had the following serum results: Na+ 140 mEq/L K+ 4.0 mEq/L Glucose 95 mg/dL BUN 10 mg/dL Which osmolality is consistent with these results?






38. 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?






39. An automated CK assay gives a reading that is above the limits of linearity. A dilution of the serum sample is made by adding 1 mL of serum to 9 mL of water. The instrument now rew 350 U/L. The correct report on the undiluted serum should be...






40. A fasting serum sample from an asymptomatic 43-year-old woman is examined visually chemically with the following results: Initial appearance of serum: Milky Appearance of serum after overnight refrigeration: Cream layer over turbid serum Triglyceri






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






42. 4 mL of water is added to 1 mL of serum. This represents this serum dilutions






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






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






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






46. 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...






47. 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...






48. Diagnostic specificity is defined as the percentage of individuals...






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






50. What specimen preparation is commonly used to perform the alkaline phosphatase isoenzyme determination?