MT AAB Chemistry Exam|Brand New Expert Exam Questions with Clear Correct Verified Answers|All Graded A+|Latest Premium Update()|100% Guaranteed Success.

MT AAB Chemistry Exam|Brand New Expert Exam Questions with Clear Correct Verified Answers|All Graded A+|Latest Premium Update()|100% Guaranteed Success. Which of the four elements in proteins differentiated this class of substances from carbohydrates and lipids? - AnswerNitrogen Which of the proteins is soluble in water? - AnswerAlbumin How are amino acids joined together to form a chainlike structure? - AnswerPeptide bonding Proteins may become denatured when subjected to mechanical agitation, heat, or chemical treatment. What does denaturation of proteins refer to? - AnswerAlteration of tertiary structure Which aminoacidopathy is NOT caused by an enzyme deficiency? - AnswerCystinuria These aminoacidopathies are caused by an enzyme deficiency: - AnswerMaple syrup disease, phenylketonuria, and alkaptonuria How many immunoglobulin classes are currently recognized? - AnswerFive Which reagent is employed in the serum protein determination? - AnswerBiuret Why should hemolyzed serum not be used for total protein analysis? - AnswerHemoglobin is absorbed at the same wavelength as protein in the reagent Which of the following is NOT true of the biuret reaction? - AnswerIt is relatively free from interference from lipids and hemoglobin Which of the following is true of the biuret reaction? - AnswerFollows Beer's law for a reasonable range of protein, depends on the presence of at least two peptide linkages, and is insensitive to the low protein levels of urine. Why is bromcresol purple the preferred indicator for albumin dye binding techniques? - AnswerThere is less interference from pigment(s) What is the most anodic protein on electrophoresis at pH 8.6? - AnswerAlbumin The total protein is 7.1 g/dL. The serum protein results are: Albumin 53.0% 3.8 g/dL Alpha1 3.6% 0.3 g/dL Alpha2 11.0% 0.8 g/dL Beta 17.6% 1.2 g/dL Gamma 14.8% 1.1 g/dL What is the A/G ratio? - Answer3.8/(.3+.8+1.2+1.1) = 1.1 A serum protein electrophoretic pattern displaying a beta gamma bridge or broad gamma is seen in which disease state? - AnswerActive cirrhosis If an electrophoretic pattern shows 30% albumin, 4%-10% alpha-globulin, 4%-10% beta-globulin, and 45% gamma globulin, then what condition may exist in the patient? - AnswerMonoclonal gammopathy Glycoproteins and mucoproteins are usually bound to which substance? - AnswerCarbohydrates All of the following are glycoproteins: - AnswerCeruloplasmin, follicle-stimulating hormone (FSH), and fibrinogen All of the following are glycoproteins EXCEPT: - AnswerCryoglobulin Which one of the following applies to cryoglobulins? - AnswerThey are temperature-sensitive proteins Which of the following statements is true of albumin? - AnswerIt is produced in the liver and is water-soluble Decreased alpha-fetoprotein values are associated with which condition? - AnswerDown syndrome Which one of the following proteins transports iron? - AnswerTransferrin In acute renal failure, which nonprotein nitrogen rises the fastest? - AnswerBlood urea nitrogen (BUN) By the urease method, urea is enzymatically converted to which end product? - AnswerAmmonia Why can untreated urine be used for the determination of urea by the diacetyl monoxomine method? - AnswerThe method is not measuring ammonia An elevated creatinine value is most likely to be accompanied by which of these values? - AnswerElevated BUN, 10X creatinine value What is the classical method for creatinine reaction? - AnswerJaffe The measurement of creatinine is based on the formation of a yellow-red color and which reagent? - AnswerAlkaline picrate The creatinine clearance test is based on which assumption? - AnswerCreatinine passes into the ultrafiltrate What is the most common clearance test used to measure the glomerular filtration rate? (GFR) - AnswerCreatinine A creatinine clearance test is performed. The 24-hour urine volume is 770 mL; serum creatinine is 2.0 mg/dL and urine creatinine is 240 mg/dL. What is the clearance, assuming average body surface area? - AnswerGFR = ([UCr x V]/SCr)/1440 64 mL/minute = [(240 x 770)/2]/1440 (1440 minutes in 24 hours) Which disease state is associated with an elevation of serum uric acid? - AnswerGout Which reagent is employed in the alkaline oxidation of uric acid? - AnswerPhosphotungstic acid