Clinical Chemistry Analytical Techniques Practice Test

These questions are part of the practice quiz. Start practicing

• To separate Calcium from Phosphate for an accurate result, which reagents are used?
• What is the role of isotopically labeled internal standards in LC-MS quantitation?
• Which quality control standard checks the wavelength accuracy of the monochromator in spectrophotometry?
• Which scenario illustrates a lack of analytical specificity due to interference?
• What is a matrix effect, and provide a representative example relevant to LC-MS quantification?
• What is the purpose of assessing calibration curve quality using metrics such as R-squared and residuals?
• Which burner is most commonly used in atomic absorption spectrophotometry?
• What is the term for the output of electrophoresis that shows separated strands of a macromolecule?
• Chemiluminescence is best described as what?
• Which of the following describes using different pipette tips for different samples?
• Eluate is defined as which?
• Why do bilirubin and hemoglobin interfere with colorimetric assays?
• What name is given to the system in which samples flow through a common reaction vessel or pathway?
• Which term describes the process of forming a fluorescent complex from non-fluorescent starting materials?
• What angle should the slide be held at for measurement?
• Which analytical approach uses a single tube or common pathway for reactions?
• Which chromatography uses equilibration in organic and aqueous solvents?
• Which analytical technique is used for atoms that cannot be excited?
• Which of the following is not typically considered an analytical error source in a clinical chemistry assay?
• Which technique is used for calcium ions?
• Which chromatography is commonly used for drugs and medication?
• Why are isotopically labeled internal standards used in LC-MS/MS quantitation?
• Stokes shift refers to which difference?
• Identify common sources of interference in immunoassays and a plausible mitigation strategy.
• What component holds the stationary phase in a column setup?
• What term describes interference caused by evaporation of solvents or formation of solids during measurement?
• Which correction technique in AAS involves pulsing the hollow cathode to produce self-reversal?
• The Severinghaus electrode is used to measure which blood gas parameter?
• Not a component of flame emission spectrophotometry?
• In random access testing, how are tests performed?
• In electrophoresis, to which electrode do negatively charged particles migrate?
• What is the purpose of a cuvette in spectrophotometric analysis?
• Which method is described as using a one-tube system?
• Which method describes separation of proteins in a homogeneous solution without a solid support medium?
• In flame emission spectrophotometry, which component provides the flame where the sample is analyzed?
• Which layer on the slide is designated to receive and spread the sample?
• Which pair of electrochemical techniques includes Amperometry and Coulometry?
• What does linear range refer to in method validation?
• Flame Emission Spectrophotometry measures which elements?
• Which testing mode analyzes more than one test concurrently on a given clinical specimen?
• Which electrode is described as being used in the measurement of chloride in body sweats?
• GC-MS is commonly used in clinical chemistry for which analyte classes, and what detectors are typical?
• What is the function of the monochromator in spectrophotometry?
• Which analytical technique is most commonly used in point-of-care testing among the following?
• Detector type used to measure light in flame emission spectrophotometry?
• Which device introduces the sample into the measurement system in AAS?
• Which of the following strategies mitigates pre-analytical interferences such as hemolysis, lipemia, and icterus?
• Which field is used for routine measurement of electrolytes?
• What is a common method to correct for turbidity or lipemia in spectrophotometric measurements?
• Which immunoassay is most appropriate for small molecules like hormones and why?
• Which layer is the primary site where the analyte is tested in the layered slide?
• Which component holds the stationary phase in a column-based setup?
• Destruction or Quenching describes which effect?
• What are common gradient profiles in LC?
• Which material is commonly used as a wavelength calibration standard in spectrophotometry?
• Which component controls light intensity in optical measurement systems?
• Which type of electrophoresis is characterized by no distinct migration zone and is also known as moving boundary electrophoresis?
• How is analyte stability typically tested in a laboratory setting?
• Which type of light is detected in flame emission spectrophotometry?
• Which layer is the primary site where chemical analysis occurs on the slide?
• In spectrophotometry, flame is equivalent to which component?
• Which instrument is used to measure absorbance and determine the area under bands in electrophoresis?
• Which gel separates serum proteins into 10-15 bands?
• Which term describes the process where the analyte reduces fluorescence intensity?
• Absorbance is also known as what?
• In a sandwich immunoassay, what is the essential design feature that enables quantification?
• Which electrophoresis method is commonly used to separate charged macromolecules like proteins?
• Outline the basic principle of atomic absorption spectroscopy and typical analyte applications.
• In a sandwich ELISA, what is the typical workflow and which controls are included?
• What is a notable advantage of chemiluminescence assays?
• In the material, which technique is described as measuring current or voltage generated by ions?
• Which term is a synonym for Moving boundary electrophoresis?
• Turbidimetry measures which property of light in a sample?
• By how many times is AAS more sensitive than FES?
• Which statement describes the stationary phase?
• In zonal electrophoresis, which fractions are resolved?
• From the listed components, which item is used for beam modulation in some spectroscopic systems?
• Which statement describes the Secondary Filter?
• Which statement describes analytical sensitivity but not necessarily high specificity?
• Which scenario best demonstrates a test with both high specificity for the target and high sensitivity?
• Standard addition is particularly useful when matrix effects are present.
• The newborn screening method described can detect approximately how many disorders?
• Which double-beam spectrophotometer configuration uses two photodetectors, one for each beam (sample and reference)?
• Which chromatography technique uses a thin layer of stationary phase on a plate and is measured by densitometer?
• Iontophoresis is a form of electrophoresis used for the migration of which species?
• Ion-exchange chromatography separates compounds by what principle and is used for which analytes?
• In which system are multiple samples processed through a shared route, rather than individually?
• In atomic absorption spectroscopy, which standard checks absorbance accuracy?
• Which statement about Lineweaver-Burk plots is correct for competitive inhibition?
• Which statement best distinguishes chemiluminescence from fluorescence?
• Which method uses narrow-bore fused silica capillaries to separate proteins?
• In electrophoresis, which buffer condition yields faster sample migration?
• In chromatography, which phase moves through the system?
• Which method emphasizes the use of multiple pipettes with distinct tips to handle samples?
• Which component converts liquid sample into aerosol in flame emission spectrophotometry?
• Zone electrophoresis describes the migration of which substances?
• Which testing approach allows any test to be performed on any sample in any sequence?
• Also known as gel filtration; separates solute based on size and shape?
• Which condition yields faster mobility?
• A clinical test yields a positive result in a patient who does not have the disease due to cross-reactivity with a similar molecule. This demonstrates a weakness in analytical
• Which gel separates serum proteins into twenty bands?
• Stokes shift is defined as which of the following?
• Which approach relies on individual handling with separate pipette tips?
• Which mass spectrometry analyzer design is commonly used for SRM/MRM targeted quantitation?
• Which electrophoresis method resolves a1, a2, B & y globulin?
• Which light source used in atomic absorption spectrophotometry is based on an argon-based design?
• Which electrode is an ion-selective electrode coated with valinomycin?
• In chromatography, which phase does not move during separation?
• Which statement best differentiates the limit of detection (LOD) from the limit of quantitation (LOQ) in clinical assays?
• Which method involves processing samples with unique tips on pipettes?
• Which technique separates proteins based on isoelectric point (pI)?
• Coupling refers to which phenomenon?
• What controls are typically included in a sandwich ELISA to ensure assay validity?
• In Conversion or Induced Fluorescence, what is typically applied to the sample to induce fluorescence?
• Which approach is associated with a one-tube system?
• Which technique can detect approximately 20 newborn metabolic disorders?
• What energy form does the FEP detector produce as its output signal?
• Indicator Layer: which method is used to objectively measure color by detecting the light reflected back from a substance at selected wavelengths?
• What is a common drawback of fluorometry?
• Which assay design is less susceptible to the hook effect?
• Describe the principle of solid-phase extraction (SPE) and its purpose.
• Which term correctly describes analysis where samples share a common reaction path?
• In fluorescence spectroscopy, what is the Stokes shift?
• Which technique is most suitable for assessing light scattered by suspended particles?
• Which electrode is described as having a valinomycin coating for ion selectivity?
• Which method uses a shared reaction pathway for samples?
• Which statement about double-beam configurations is true?
• Which statement best describes precision in analytical method validation?
• Analytical specificity is best described as which of the following?
• What is a calibration curve and what are its essential components for a clinical assay?
• What is an advantage of isotope-dilution mass spectrometry over immunoassays for certain analytes?
• Why is gradient elution used in liquid chromatography?
• Analytical specificity differs from analytical sensitivity in that:
• Which technique quantifies turbidity by measuring the reduction in transmitted light?
• Which spectrophotometry method is used for trace elements in the body?
• Solute adsorbed on the surface of the stationary phase corresponds to which chromatography type?
• Which practice is NOT a recommended mitigation for pre-analytical interferences such as hemolysis, lipemia, or icterus?
• What medium separates serum proteins into five bands?
• Nephelometry measures what aspect of light in a suspension?
• In assay evaluation, which scenario best demonstrates both high specificity and high sensitivity?
• How do pH and buffer strength influence chromatographic separation and analyte stability?
• How do you interpret the difference between a reference interval and a clinical decision limit?
• In atomic absorption spectroscopy sample preparation for calcium analysis, which cations are added to mask phosphate interference?
• Which instrument computes the area under the absorbance in electrophoresis?
• Describe the Beer-Lambert law and its applicability to UV-Vis spectrophotometry in clinical laboratories.
• Flame emission uses which gas?
• Which gel cannot be used for proteins?
• Which chromatography method uses pressure for fast separation of thermolabile substances?
• How is chromatographic resolution Rs defined?
• Which instrument is commonly known as the Clark electrode?
• Which MS design is particularly well-suited for targeted quantitation using SRM/MRM due to its selectivity and speed?
• Which statement about enzyme inhibitors and their effects on Km and Vmax is correct?
• Which electrode is used to measure PCO2 in blood gas analysis?
• In paper chromatography, the stationary phase is what?
• Which instrument is described as an ion-selective electrode with a glass membrane?
• Which gel type is associated with resolving proteins into five distinct bands?
• Which electrode measures PO2 in blood gas analysis?
• What term describes the movement of buffer ions and solvent relative to the fixed support?
• Which analysis approach is defined by employing different pipettes using different tips?
• In frontal electrophoresis, which fractions are resolved?
• Which electrophoresis method is used for the migration of small ions under an electric field?
• Which technique uses capillary tubes (narrow-bore fused silica) to separate proteins?
• Which option is NOT listed as a fluorometry type in the material?
• Which device isolates a specific wavelength in flame emission spectrophotometry?
• How is accuracy assessed in analytical method validation?
• Which instrument turns molecules into atoms by delivering a fine spray containing metallic ions?
• In isotope-dilution mass spectrometry, what is the primary purpose of the stable isotope-labeled analog?
• What is the correct sequence of components in a typical flame emission spectrophotometer?
• Explain the principle of LC-MS/MS with MRM and the role of internal standards.
• Which analysis method would require using a fresh tip for each sample?
• Separated components in chromatography are called:
• Which statement best illustrates analytical specificity and sensitivity in a troponin assay?
• When do excited atoms emit light in flame emission spectroscopy?
• What is the label for the positively charged electrode in electrophoresis?
• In batch testing, how are samples processed?
• In atomic absorption spectrometry, which component is commonly used as the light source?
• What component modulates the hollow cathode light beam in atomic absorption spectrometry?
• Which background correction method uses a magnetic field to distinguish signal from background in AAS?
• Dyes like auramine-rhodamine are associated with which fluorometry type?
• Primary Filter is used to
• What method separates proteins by their isoelectric point?
• What is the basic principle of enzyme assays and which parameters define enzyme kinetics?
• Which correction technique involves pulsing the hollow cathode to achieve self-reversal?
• Specificity is best described as which of the following proportions?
• A troponin assay with a very low limit of detection most strongly indicates which analytic property?
• What is the purpose of including a blank sample in an immunoassay or ELISA?
• Certified reference materials provide what features?
• In GC-MS, what detectors are typically used, and when might a secondary detector be employed?
• In establishing LOD and LOQ, what signal-to-noise ratios are commonly used?
• In sequential testing, how are tests performed?
• In LC-MS, ion suppression leads to which effect?
• How does fluorescence spectroscopy work, including the Stokes shift, and what clinical analytes are commonly measured?
• What is the hook effect in immunoassays and how can it be mitigated?
• Which component isolates specific wavelengths of light in spectroscopy?
• Cystic fibrosis testing is associated with which electrophoresis method?
• Interference from the sample matrix can affect which analytic property, potentially causing false negatives?
• Which background correction method employs a strong electromagnetic field at the sample site?
• What are typical criteria for freeze-thaw stability testing?
• Which statement describes a test with high analytical sensitivity but lower specificity?
• How are QA and QC distinguished in a chemical laboratory's practices?
• Which method uses an electrode with constant voltage?
• Which statement best describes immunoassay formats? A competitive and a sandwich immunoassay differ in what way?
• Which term best describes a system where all samples move through the same reaction vessel?
• Which phenomenon describes the movement of buffer ions relative to the fixed support during electrophoresis?
• Which statement describes the mobile phase?
• Which electrophoresis method forms sharp zones (distinct migrating bands)?
• The developed spot is measured by densitometer in which technique?
• Positive particles move toward which electrode?
• Which calibration approach uses a stable isotope-labeled compound as an internal standard to correct for procedural variability?
• Which electrode is an ion-selective electrode with a glass membrane?
• The splitting of spectral lines into multiple components when atoms are in a magnetic field is called what?
• Which statement best describes a test with high analytical specificity but only moderate sensitivity?
• Which device is associated with a one-tube system in analytical workflows?
• Which statement about dynamic range is true?
• In protein precipitation sample preparation, what is the correct sequence of steps?
• What is the purpose of matrix-matched calibration in LC-MS quantitation?
• What does a higher chromatographic resolution Rs indicate about two adjacent peaks?
• Net charge is directly proportional to electrophoretic mobility.
• For a troponin assay, which feature supports both high specificity for cardiac troponin and a low limit of detection?
• What is the principle behind flame emission spectroscopy?
• Analytical sensitivity refers to which characteristic?
• Which analyzer provides high-resolution accurate mass suitable for untargeted screening?
• The photosensitive detector of FEP converts energy from gradient to electrical energy.
• Chemiluminescence is defined as light emission produced by a chemical reaction without requiring external light.
• Which electrophoresis method yields albumin as a fraction along with a,b,y globulins?
• Which double-beam configuration uses a single photodetector to monitor both sample and reference cells?
• Viscosity is inversely proportional to electrophoretic mobility.
• Turbidimetry is dependent on which factors?
• Fluorometry offers about how much greater sensitivity than spectrophotometry?
• Molecular size is inversely proportional to electrophoretic mobility.
• Which testing approach processes all samples together with a single test per sample?
• What is Liquid Chromatography primarily used for?
• What is Westgard multirule QC and what is the purpose of rule 1-3s?
• Compare isocratic and gradient HPLC and explain how the mobile phase composition affects separation.
• Direct Fluorometry is defined by which characteristic?
• Which testing approach allows multiple tests to be analyzed concurrently on a single specimen?
• In slide-based assays, which layer is the portion of the slide that accepts the sample?
• What is the term for interference arising from solvent evaporation or solids formation during measurement?
• Which device is a gas-tight chamber filled with inert gas according to the material?
• What is derivatization in GC/LC analysis used for, and when is it necessary?