BRAINSCAPE1
MT AAB Chemistry Exam with
complete solutions latest version
Which of the four elements in proteins differentiated this class of substances from
carbohydrates and lipids? - CORRECT ANSWER-Nitrogen
Which of the proteins is soluble in water? - CORRECT ANSWER-Albumin
How are amino acids joined together to form a chainlike structure? - CORRECT
ANSWER-Peptide bonding
Proteins may become denatured when subjected to mechanical agitation, heat, or
chemical treatment. What does denaturation of proteins refer to? - CORRECT
ANSWER-Alteration of tertiary structure
Which aminoacidopathy is NOT caused by an enzyme deficiency? - CORRECT
ANSWER-Cystinuria
These aminoacidopathies are caused by an enzyme deficiency: - CORRECT ANSWER-
Maple syrup disease, phenylketonuria, and alkaptonuria
How many immunoglobulin classes are currently recognized? - CORRECT ANSWER-
Five
Which reagent is employed in the serum protein determination? - CORRECT ANSWER-
Biuret
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
Which of the following is NOT true of the biuret reaction? - CORRECT ANSWER-It is
relatively free from interference from lipids and hemoglobin
BRAINSCAPE1
, BRAINSCAPE1
Which of the following is true of the biuret reaction? - CORRECT ANSWER-Follows
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? -
CORRECT ANSWER-There is less interference from pigment(s)
What is the most anodic protein on electrophoresis at pH 8.6? - CORRECT ANSWER-
Albumin
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? - CORRECT ANSWER-3.8/(.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? - CORRECT ANSWER-Active 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? -
CORRECT ANSWER-Monoclonal gammopathy
Glycoproteins and mucoproteins are usually bound to which substance? - CORRECT
ANSWER-Carbohydrates
All of the following are glycoproteins: - CORRECT ANSWER-Ceruloplasmin, follicle-
stimulating hormone (FSH), and fibrinogen
All of the following are glycoproteins EXCEPT: - CORRECT ANSWER-Cryoglobulin
Which one of the following applies to cryoglobulins? - CORRECT ANSWER-They are
temperature-sensitive proteins
Which of the following statements is true of albumin? - CORRECT ANSWER-It is
produced in the liver and is water-soluble
Decreased alpha-fetoprotein values are associated with which condition? - CORRECT
ANSWER-Down syndrome
Which one of the following proteins transports iron? - CORRECT ANSWER-Transferrin
In acute renal failure, which nonprotein nitrogen rises the fastest? - CORRECT
ANSWER-Blood urea nitrogen (BUN)
BRAINSCAPE1
MT AAB Chemistry Exam with
complete solutions latest version
Which of the four elements in proteins differentiated this class of substances from
carbohydrates and lipids? - CORRECT ANSWER-Nitrogen
Which of the proteins is soluble in water? - CORRECT ANSWER-Albumin
How are amino acids joined together to form a chainlike structure? - CORRECT
ANSWER-Peptide bonding
Proteins may become denatured when subjected to mechanical agitation, heat, or
chemical treatment. What does denaturation of proteins refer to? - CORRECT
ANSWER-Alteration of tertiary structure
Which aminoacidopathy is NOT caused by an enzyme deficiency? - CORRECT
ANSWER-Cystinuria
These aminoacidopathies are caused by an enzyme deficiency: - CORRECT ANSWER-
Maple syrup disease, phenylketonuria, and alkaptonuria
How many immunoglobulin classes are currently recognized? - CORRECT ANSWER-
Five
Which reagent is employed in the serum protein determination? - CORRECT ANSWER-
Biuret
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
Which of the following is NOT true of the biuret reaction? - CORRECT ANSWER-It is
relatively free from interference from lipids and hemoglobin
BRAINSCAPE1
, BRAINSCAPE1
Which of the following is true of the biuret reaction? - CORRECT ANSWER-Follows
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? -
CORRECT ANSWER-There is less interference from pigment(s)
What is the most anodic protein on electrophoresis at pH 8.6? - CORRECT ANSWER-
Albumin
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? - CORRECT ANSWER-3.8/(.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? - CORRECT ANSWER-Active 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? -
CORRECT ANSWER-Monoclonal gammopathy
Glycoproteins and mucoproteins are usually bound to which substance? - CORRECT
ANSWER-Carbohydrates
All of the following are glycoproteins: - CORRECT ANSWER-Ceruloplasmin, follicle-
stimulating hormone (FSH), and fibrinogen
All of the following are glycoproteins EXCEPT: - CORRECT ANSWER-Cryoglobulin
Which one of the following applies to cryoglobulins? - CORRECT ANSWER-They are
temperature-sensitive proteins
Which of the following statements is true of albumin? - CORRECT ANSWER-It is
produced in the liver and is water-soluble
Decreased alpha-fetoprotein values are associated with which condition? - CORRECT
ANSWER-Down syndrome
Which one of the following proteins transports iron? - CORRECT ANSWER-Transferrin
In acute renal failure, which nonprotein nitrogen rises the fastest? - CORRECT
ANSWER-Blood urea nitrogen (BUN)
BRAINSCAPE1
