AAB MT Chemistry- Practice| 114 questions and answers.

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 d. cystinuria What method is most commonly used to measure total protein? Choose one answer. a. dye binding b. Kjeldahl c. Biuret d. refractometry 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 a. Rf What is the confirmatory method for measuring drugs on abuse using the mass-to-charge ratio? Choose one answer. a. thin layer chromatography b. isoelectric focusing c. serum protein electrophoresis d. gas chromatography with mass spectroscopy d. gas chromatography with mass spectroscopy What term is used to describe the process of glycogen degradation? Choose one answer. a. glycogenolysis b. glycogenesis c. glycolysis d. gluconeogenesis a. glycogenolysis What hormone produced by the islets of Langerhans decreases glucose? Choose one answer. a. glucagon b. insulin c. epinephrine d. cortisol b. insulin A 40-year-old male has a random glucose of 270 mg/dL. This laboratory finding is consistent with which of the following conditions? Choose one answer. a. von Gierke disease b. diabetes insipidus c. insulinoma d. diabetes mellitus d. diabetes mellitus Which of the following methods is considered the reference method for measuring glucose due to its increased accuracy and sensitivity? Choose one answer. a. hexokinase b. o-toluidine c. glucose dehydrogenase d. glucose oxidase a. hexokinase What analyte is used to measure the long term control of a diabetis glucose levels? Choose one answer. a. fasting blood glucose b. glucose tolerance test c. fructosamine d. hemoglobin A1C d. hemoglobin A1C Lipemia is associated with an increased amount of which of the following? Choose one answer. a. LDL cholesterol b. triglycerides c. HDL cholesterol d. bilirubin b. triglycerides The enzymatic hydrolysis of triglyceride may be accomplished by what enzyme? Choose one answer. a. amylase b. cholesterol esterase c. cholesterol oxidase d. lipase d. lipase Most triglyceride procedures involve the measurement of what end product? Choose one answer. a. lipoprotein b. glycerol c. fatty acids d. phospholipids b. glycerol Which of the following formulas is used to calculate LDL cholesterol? Choose one answer. a. LDL cholesterol = cholesterol + (triglycerides/5 + HDL cholesterol) b. LDL cholesterol = cholesterol - (triglycerides/5 - HDL cholesterol) c. LDL cholesterol = cholesterol - HDL - (triglycerides/5) d. LDL cholesterol = cholesterol + (triglycerides/5 - HDL cholesterol) c. LDL cholesterol = Total cholesterol - HDL - (triglycerides/5) An elevated concentration of what analyte decreases risk of coronary heart disease? Choose one answer. a. HDL cholesterol b. LDL cholesterol c. triglycerides d. total cholesterol a. HDL cholesterol