AAB MT CHEMISTRY TEST QUESTIONS AND
ANSWERS GRADED A+ 100% VERIFIED
1. Which of the four elements is proteins differentiates this class substances from
carbohydrates and lipids?
A. carbon
B. hydrogen
C. nitrogen
D. oxygen
Answer: C. Nitrogen
2. Which of the proteins is soluble in water?
A. albumin
B. alpha-globulins
C. beta-globulins
D. gamma-globulins
, Answer: A. Albumin
3. How are amino acids joined together to form a chainlike structure?
A. disulfide bonding
B. hydrogen bonding
C. covalent bonding
D. peptide bonding
Answer: D. Peptide bonding
4. Proteins may become denatured when subjected to mechanical agitation, heat, or
chemical treatment. What does denaturation of proteins refer to?
A. amino acid substitution
B. addition of a prosthetic group
C. alteration in tertiary structure
D. increase in solubility
Answer: C. Alteration in tertiary structure
5. Which aminoacidopathy is NOT caused by an enzyme deficiency?
,A. maple syrup substitution
B. phenylketonuria
C. alkaptonuria
D. cystinuria
Answer: D. Cystinuria
6. How many immunoglobulin classes are currently recognized?
A. two
B. three
C. four
D. five
Answer: D. Five
7. Which reagent is employed in the serum protein determination?
A. biuret
B. molybdenum blue
C. ferricferrocyanide
, D. diacetyl monoxime
Answer: A. Biuret
8. Why should hemolyzed serum not be used for total protein analysis?
A. hemoglobin is absorbed at the same wavelength as protein in the reagent
B. there are elevated protein amounts in red blood cells as compared to serum
C. hemoglobin reacts with biuret reagent
D. the value will be falsely lowered
Answer: A. Hemoglobin is absorbed at the same wavelength as protein in the reagent
9. Which of the following is NOT true of the biuret reaction?
A. follows Beer's Law for a reasonable range of protein
B. depends on the presence of at least two peptide linkages
ANSWERS GRADED A+ 100% VERIFIED
1. Which of the four elements is proteins differentiates this class substances from
carbohydrates and lipids?
A. carbon
B. hydrogen
C. nitrogen
D. oxygen
Answer: C. Nitrogen
2. Which of the proteins is soluble in water?
A. albumin
B. alpha-globulins
C. beta-globulins
D. gamma-globulins
, Answer: A. Albumin
3. How are amino acids joined together to form a chainlike structure?
A. disulfide bonding
B. hydrogen bonding
C. covalent bonding
D. peptide bonding
Answer: D. Peptide bonding
4. Proteins may become denatured when subjected to mechanical agitation, heat, or
chemical treatment. What does denaturation of proteins refer to?
A. amino acid substitution
B. addition of a prosthetic group
C. alteration in tertiary structure
D. increase in solubility
Answer: C. Alteration in tertiary structure
5. Which aminoacidopathy is NOT caused by an enzyme deficiency?
,A. maple syrup substitution
B. phenylketonuria
C. alkaptonuria
D. cystinuria
Answer: D. Cystinuria
6. How many immunoglobulin classes are currently recognized?
A. two
B. three
C. four
D. five
Answer: D. Five
7. Which reagent is employed in the serum protein determination?
A. biuret
B. molybdenum blue
C. ferricferrocyanide
, D. diacetyl monoxime
Answer: A. Biuret
8. Why should hemolyzed serum not be used for total protein analysis?
A. hemoglobin is absorbed at the same wavelength as protein in the reagent
B. there are elevated protein amounts in red blood cells as compared to serum
C. hemoglobin reacts with biuret reagent
D. the value will be falsely lowered
Answer: A. Hemoglobin is absorbed at the same wavelength as protein in the reagent
9. Which of the following is NOT true of the biuret reaction?
A. follows Beer's Law for a reasonable range of protein
B. depends on the presence of at least two peptide linkages
