TIETZ FUNDAMENTALS OF CLINICAL
CHEMISTRY AND MOLECULAR
DIAGNOSTICS EIGHTH EDITION NADER
RIFAI COMPREHENSIVE EXAMS SET
COMPLETE QUESTIONS AND CORRECT
ANSWERS GRADED A+
⩥ How much 0.20 M glucose solution can be made from 50 mL of 0.50
M glucose solution?
Answer: 125 ml
⩥ The wavelengths in the ultraviolet region are?
Answer: Below 380 nm
⩥ From the data, calculate the concentration on the analyte in the serum
sample read at 560 nm.
Absorbance of unknown sample = 0.325
Absorbance of a 200 mg/dl standard = 0.460
Answer: 141 mg/dl
,⩥ Chemicals exist in varying degrees of purity. For quantitative
measurements and preparation of accurate standard solutions, it is
important to use pure chemicals labeled as?
Answer: Reagent grade
⩥ Which of the following statements concerning Type 1 reagent grade
water is true.
Answer: It is recommended for use in procedures requiring minimal
interference and maximal precision and accuracy
⩥ To obtain better separation liquid ad solid components by
centrifugation
Answer: increase the speed of the head
⩥ Preanalytical variables in laboratory testing include?
Answer: Specimen acceptability
⩥ An index of precision is statically known as?
Answer: Coefficient of variation
⩥ The ability of a procedure to measure only the components it claims to
measure is?
Answer: Specificity
, ⩥ The extent to which measurements agree with the true value of the
quantity being measured is known as?
Answer: Accuracy
⩥ When the exact concentration of the solute of a solution is known and
is used to evaluate the concentration of the unknown solution, the known
solution is a?
Answer: Standard
⩥ In absorption spectrophotometry: What is the coefficient of variation
for this creatinine testing method? Use (mean= .97 mg/dl, SD = .14
mg/dl)
Answer: 7.22 %
⩥ What light cannot be measured directly?
Answer: Absorbed
⩥ In absorption spectrophotometry
Answer: absorbance is directly proportional to concentration
⩥ Define quality assurance as it applies to the clinical laboratory
Answer: The quality assurance system in clinical chemistry allows for
the identification of errors and control actions to correct them. It is well
CHEMISTRY AND MOLECULAR
DIAGNOSTICS EIGHTH EDITION NADER
RIFAI COMPREHENSIVE EXAMS SET
COMPLETE QUESTIONS AND CORRECT
ANSWERS GRADED A+
⩥ How much 0.20 M glucose solution can be made from 50 mL of 0.50
M glucose solution?
Answer: 125 ml
⩥ The wavelengths in the ultraviolet region are?
Answer: Below 380 nm
⩥ From the data, calculate the concentration on the analyte in the serum
sample read at 560 nm.
Absorbance of unknown sample = 0.325
Absorbance of a 200 mg/dl standard = 0.460
Answer: 141 mg/dl
,⩥ Chemicals exist in varying degrees of purity. For quantitative
measurements and preparation of accurate standard solutions, it is
important to use pure chemicals labeled as?
Answer: Reagent grade
⩥ Which of the following statements concerning Type 1 reagent grade
water is true.
Answer: It is recommended for use in procedures requiring minimal
interference and maximal precision and accuracy
⩥ To obtain better separation liquid ad solid components by
centrifugation
Answer: increase the speed of the head
⩥ Preanalytical variables in laboratory testing include?
Answer: Specimen acceptability
⩥ An index of precision is statically known as?
Answer: Coefficient of variation
⩥ The ability of a procedure to measure only the components it claims to
measure is?
Answer: Specificity
, ⩥ The extent to which measurements agree with the true value of the
quantity being measured is known as?
Answer: Accuracy
⩥ When the exact concentration of the solute of a solution is known and
is used to evaluate the concentration of the unknown solution, the known
solution is a?
Answer: Standard
⩥ In absorption spectrophotometry: What is the coefficient of variation
for this creatinine testing method? Use (mean= .97 mg/dl, SD = .14
mg/dl)
Answer: 7.22 %
⩥ What light cannot be measured directly?
Answer: Absorbed
⩥ In absorption spectrophotometry
Answer: absorbance is directly proportional to concentration
⩥ Define quality assurance as it applies to the clinical laboratory
Answer: The quality assurance system in clinical chemistry allows for
the identification of errors and control actions to correct them. It is well
