AAB MT Chemistry- Practice Questions with 100% Correct Answers | Verified | Updated 2024, Exams of Advanced Education

Download AAB MT Chemistry- Practice Questions with 100% Correct Answers | Verified | Updated 2024 and more Exams Advanced Education in PDF only on Docsity! AAB MT Chemistry- Practice Questions with 100% Correct Answers | Verified | Updated 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 pg. 1 professoraxel 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 pg. 2 professoraxel 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 pg. 5 professoraxel 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 pg. 6 professoraxel 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. Rf What is the confirmatory method for measuring drugs on abuse using the mass-to-charge ratio? pg. 7 professoraxel 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 - Correct Answer-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 - Correct Answer-b. triglycerides The enzymatic hydrolysis of triglyceride may be accomplished by what enzyme? Choose one answer. a. amylase b. cholesterol esterase pg. 10 professoraxel c. cholesterol oxidase d. lipase - Correct Answer-d. lipase Most triglyceride procedures involve the measurement of what end product? Choose one answer. a. lipoprotein b. glycerol c. fatty acids d. phospholipids - Correct Answer-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) - Correct Answer-c. LDL cholesterol = Total cholesterol - HDL - (triglycerides/5) pg. 11 professoraxel 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 - Correct Answer-a. HDL cholesterol Which of the following enzymes is most greatly affected by hemolysis? Choose one answer. a. alanine aminotransferase b. lactate dehydrogenase c. gamma-glutamyltransferase d. amylase - Correct Answer-b. lactate dehydrogenase What serum enzyme begins to rise 2 to 4 hours, has peak activity occurring 12 to 36 hours, and returns to normal 2 to 4 days after an acute myocardial infarction? Choose one answer. pg. 12 professoraxel b. 70-82 c. 67-85 d. 64-88 - Correct Answer-b. 70-82 What term refers to the lowest detectable amount of an analyte? Choose one answer. a. analytical specificity b. diagnostic specificity c. diagnostic sensitivity d. analytical sensitivity - Correct Answer-d. analytical sensitivity A 15-year old male complains of fever, sore throat, swollen lymph nodes and malaise. Laboratory results are positive for both infectious mononucleosis and syphilis. What is the best explanation for the syphilis result? Choose one answer. a. false negative b. false positive c. true negative pg. 15 professoraxel d. true positive - Correct Answer-b. false positive It is appropriate to accept the control and report patient results when which of the following Westguard rules is violated? Choose one answer. a. 1 4s b. 1 2s c. 1 3s d. 2 2s - Correct Answer-b. 1 2s Overproduction of what hormone results in acromegaly? Choose one answer. a. vasopressin b. growth hormone c. prolactin d. calcitonin - Correct Answer-b. growth hormone What hormone appears to function solely in the initiation and maintenance of lactation? Choose one answer. pg. 16 professoraxel a. follicle-stimulating hormone b. estrogen c. prolactin d. progesterone - Correct Answer-c. prolactin What hormone acts on the distal convoluted tubules to increase water reabsorption? Choose one answer. a. aldosterone b. antidiuretic hormone c. renin d. erythropoietin - Correct Answer-b. antidiuretic hormone What is the hormone that controls the reabsorption of sodium in the kidney? Choose one answer. a. antidiuretic hormone b. aldosterone c. vasopressin d. secretin - Correct Answer-b. aldosterone pg. 17 professoraxel c. metabolic alkalosis d. respiratory alkalosis - Correct Answer-b. metabolic acidosis What results are consistent with compensated metabolic alkalosis? Choose one answer. a. increased pH, decreased CO2, decreased HCO3- b. increased pH, decreased CO2, increased HCO3- c. increased pH, increased CO2, decreased HCO3- d. increased pH, increased CO2, increased HCO3- - Correct Answer-d. increased pH, increased CO2, increased HCO3- All of the following hormones regulate calcium levels EXCEPT which one? Choose one answer. a. aldosterone b. parathyroid hormone c. vitamin D d. calcitonin - Correct Answer-a. aldosterone pg. 20 professoraxel Which of the following specimens is acceptable for the determination of total calcium? Choose one answer. a. oxalated plasma b. heparinized plasma c. EDTA plasma d. fluorinated plasma - Correct Answer-b. heparinized plasma At a pH of 7.4, most of the phosphorus in the body is in which form? Choose one answer. a. DNA/RNA b. bone c. 2,3 DPG d. ATP/ADP - Correct Answer-b. bone What is the most abundant iron-containing compound in the body? Choose one answer. a. transferrin b. ferritin pg. 21 professoraxel c. myoglobin d. hemopexin - Correct Answer-b. ferritin What protein transports the majority of copper in the bloodstream? Choose one answer. a. transferrin b. transcuprein c. ceruloplasmin d. albumin - Correct Answer-c. ceruloplasmin What is the major extracellular cation? Choose one answer. a. sodium b. potassium c. magnesium d. chloride - Correct Answer-a. sodium The following metabolic panel results are available on an ICU patient Glucose 70 mg/dL pg. 22 professoraxel What is the best single indicator of renal disease? Choose one answer. a. polyuria b. pyuria c. proteinuria d. glycosuria - Correct Answer-c. proteinuria Which of the following conditions is associated with an increased CSF total protein and a decreased CSF glucose level? Choose one answer. a. bacterial meningitis b. subarachnoid hemorrhage c. traumatic tap d. multiple sclerosis - Correct Answer-a. bacterial meningitis White blood cell casts are associated with which of the following conditions? Choose one answer. a. acute glomerulonephritis b. nephrotic syndrome c. renal calculi pg. 25 professoraxel d. acute pyelonephritis - Correct Answer-d. acute pyelonephritis Vaginal contamination may be responsible for the appearance of which of the following in the patient urine specimen? Choose one answer. a. oval fat bodies b. squamous epithelial cells c. amorphous crystals d. hyaline casts - Correct Answer-b. squamous epithelial cells What cast may appear in urine of normal, healthy individuals? Choose one answer. a. granular b. hyaline c. waxy d. red blood cell - Correct Answer-b. hyaline In the coulometric-amperometric method for chloride, how is the amount of chloride measured? - Correct Answer-time needed to reach the titration end point pg. 26 professoraxel What is the purpose of lanthanum in the atomic absorption determination of calcium? - Correct Answer-It will bind phosphate what is the classical method for creatinine reaction? - Correct Answer-jaffe The Porter-Silber reaction employs phenylhydrazine to detect which analyte? - Correct Answer-corticosteroids what is the most frequently employed automated method for glucose? - Correct Answer-coupled enzyme system consisting of glucose oxidase and peroxidase what is the specimen of choice for glucose determination? - Correct Answer-fluorinated plasma which one of the following applies to cryoglobulins? - Correct Answer-the are temperature-sensitive proteins pg. 27 professoraxel Which one of the following statements is true concerning a protein at its isoelectric point? - Correct Answer-net zero charge Which analytical method measures the amount of light scattered by the particles in solution? - Correct Answer- nephelometry In the complexometric titration (EDTA) method for calcium, the pH must be adjusted to prevent what occurrence? - Correct Answer-interference by magnesium which reagent is employed in the alkaline oxidation of uric acid? - Correct Answer-phosphotungstic acid Which enzyme catalyzes the reaction? lactase+NAD->pyruvate+NADH - Correct Answer-lactate dehydrogenace in the classic Schales-Schales (mercurimetric titration) method for chloride, what substance reacts with the indicator to form a violet color? - Correct Answer-excess Hg++ (mercury) pg. 30 professoraxel Which one of the following diseases is associated with hypoglycemia? - Correct Answer-von Gierke's disease Quenching is a disadvantage in which type of instumentation? - Correct Answer-fluorometry Both porphobilinogen and urobilinogen form a red-colored compound with Ehrlich's reagent. How can they be differentiated? - Correct Answer-urobilinogen is soluble in chloroform why should hemolyzed serum not be used for total protein analysis? - Correct Answer-hemoglobin is absorbed at the same wavelength as protein in the reagent what is hexokinase methodology for glucose determination based on? - Correct Answer-reduced coenzyme read at 340 nm Creatinine kinase is frequently elevated in acute myocardial infraction and which other disorder? - Correct Answer- Duchenne's muscular dystrophy pg. 31 professoraxel why is bromcresol purple the preferred indicator for albumin dye binding techniques? - Correct Answer-there is less interference from pigment(s) For the ultraviolet range, which of these must be employed in the spectrophotometer? - Correct Answer-quartz cuvette An increase in indirect-reacting bilirubin is suggestive of which condition? - Correct Answer-hemoglobin breakdown What is the clinical significance of an elevated acid phosphatase (ACP)? - Correct Answer-prostatic disease Catecholamines are secreted by which one of the following? - Correct Answer-drenal medulla Which hormone exhibits diurnal variation? - Correct Answer- cortisol Which analyte is an early indicator of tissue hypoxia? - Correct Answer-lactic acid pg. 32 professoraxel