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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. A 24-hour urine specimen (total volume = 1136 mL) is submitted to the laboratory for quantitative urine protein. Calculate the amount of protein excreted per day - if the total protein is 52 mg/dL.






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






3. What substance gives feces its normal color?






4. An electrode has a silver/silver chloride anode and a platinum wire cathode. It is suspended in KCl solution and separated from the blood to be analyzed by a selectively permeable membrane. Such an electrode is used to measure...






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






6. The following data were obtained on amniotic fluid from a gestation of 36 weeks' duration by menstrual dates: L/S = 2 Phosphatidyl glycerol not present This can be concluded from these data?






7. A patient is admitted with biliary cirrhosis. If a serum protein electrophoresis is preformed - these globulin fractions will be most elevated?






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






9. Calcium concentration in the serum is regulated by...






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






11. As part of a hyperlipidemia screening program - the following results were obtained on a 25 year old woman 6 hours after eating:Triglycerides = 260 mg/dLCholesterol = 120 mg/dL - This is the BEST interpretation of these results?






12. Quantitation of NA+ and K+ by ion-selective electrode is more rapid than flame photometry because...






13. Nephelometers measure light...






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






15. The most common type of congenital adrenal hyperplasia associated with increased plasma concentrations of 17 a-hydroxyprogesterone and increased urinary excretion of pregnanetriol is...






16. The following five sodium control values (mEq/L) were obtained:140 - 135 - 138 - 140 - 142Calculate the coefficient of variation.






17. 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






18. The main reason for suboptimal drug levels in therapeutic drug monitoring is...






19. Aminotransferase enzymes catalyze the...






20. In the atomic absorption method for calcium - lanthanum is used...






21. The formula for calculating serum osmolality that incorporates a correction for the water content of plasma is...






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






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






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






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






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






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






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






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






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






31. The buffering capacity of blood is maintained by a reversible exchange process between bicarbonate and...






32. 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?






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






34. The first step in analyzing a 24-hour urine specimen for quantitative urine protein is...






35. 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...






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. The test for adrenal cortical hyperfunction that has the greatest diagnostic sensitivity is measurement of...






38. Thiis serum protein fraction is most likely to be elevated in patients with nephrotic syndrome?






39. Amino acid associated with a sulfhydryl group






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






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






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






43. An increase in serum acetone is indicative of a defect in the metabolism of...






44. A serum sample for acid phosphatase determination is best prepared for room temperature storage by...






45. Turbidity in serum suggests elevation 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. 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?






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






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






50. A blood sample was received from the emergency room with a request for narcotic analysis. The request slip indicated that the patient (a known heroin addict) responded to naloxone administration. The serum was negative for morphine by EIA. What other