AAB MT CHEMISTRY PRACTICE QUESTIONS AND CORRECT ANSWERS 2023/2024

AAB MT CHEMISTRY PRACTICE QUESTIONS AND CORRECT ANSWERS 2023/2024 Which of the following aminoacidopathies is NOT caused by an enzyme deficiency? Choose one answer. a. phenylketonuria b. alkaptonuria c. maple syrup disease d. cystinuria - CORRECT ANSWER-d. cystinuria What method is most commonly used to measure total protein? Choose one answer. a. dye binding b. Kjeldahl c. Biuret d. refractometry - CORRECT ANSWER-c. Biuret Which of the following is the preferred reagent for measuring albumin by the dye binding method because there is less interfering substances? Choose one answer. a. bromcresol green b. HABA c. bromcresol purple d. methyl orange - CORRECT ANSWER-c. bromcresol purple Which of the following proteins is a negative acute phase reactant? Choose one answer. a. haptoglobin b. hemopexin c. ceruloplasmin d. transferrin - CORRECT ANSWER-d. transferrin Which of the following cardiac markers is the most sensitive for the detection of an acute myocardial infarction? Choose one answer. a. CKMB b. LD1/LD2 flip c. troponin d. myoglobin - CORRECT ANSWER-c. troponin Which of the following anticoagulants is acceptable for the measurement of BUN? Choose one answer. a. fluoride b. heparin c. oxalate d. citrate - CORRECT ANSWER-b. heparin Which of the following analytes must be measured in order to calculate the estimated glomerular filtration rate (eGFR)? Choose one answer. a. urine creatinine b. body surface area c. 24-hour urine volume d. serum creatinine - CORRECT ANSWER-d. serum creatinine Plasma is the specimen of choice for which of the following analytes? Choose one answer. a. creatinine b. ammonia c. blood urea nitrogen d. uric acid - CORRECT ANSWER-b. ammonia What disease state is associated with an elevation of serum uric acid? Choose one answer. a. gout b. atherosclerosis c. Reye's syndrome d. diabetes - CORRECT ANSWER-a. gout Which one of the following analytes is used as a prognostic indicator for liver failure? Choose one answer. a. uric acid b. cortisol c. blood urea nitrogen d. ammonia - CORRECT ANSWER-d. ammonia What statement concerning optical density according to Beers law is true? Choose one answer. a. it is directly proportional to the concentration b. it is proportional to the square root of the absorbance c. it is proportional to the square root of the concentration d. it is inversely proportional to the concentration - CORRECT ANSWER-a. it is directly proportional to the concentration What is the light source in atomic absorption spectrophotometry? Choose one answer. a. tungsten b. deuterium c. mercury d. hollow cathode lamp - CORRECT ANSWER-d. hollow cathode lamp Which analytical method measures the amount of light scattered by the particles in solution at a 90° angle? Choose one answer. a. hydroelectric focusing b. turbidimetry c. chemiluminescence d. nephelometry - CORRECT ANSWER-d. nephelometry Ion-selective electrodes are an example of which of the following electrochemical methods? Choose one answer. a. polarography b. coulometry c. potentiometry d. amperometry - CORRECT ANSWER-c. potentiometry Acridinium esters are commonly used in which of the following immunoassays? Choose one answer. a. radioimmunoassay b. enzyme immunoassay c. fluorescence immunoassay d. chemiluminenscence immunoassay - CORRECT ANSWER-d. chemiluminenscence immunoassay What element is reduced at the cathode of a Clark electrode? Choose one answer. a. carbon dioxide b. glucose c. oxygen d. potassium - CORRECT ANSWER-c. oxygen In thin layer chromatography, what is the distance the solute migrates divided by the distance the solvent migrates? Choose one answer. a. Rf b. pKa c. Tm d. Km - CORRECT ANSWER-a. R