CSMLS Practice Questions with Verified Answers

CSMLS Practice Questions with Verified Answers Which is the detector of choice for nephelometers? Select one: a. diode array b. photomultiplier tube c. gas photodiode d. LED b Which statement regarding turbidimetry is NOT correct? Select one: a. light scattered by solutes in the solution at 180° from the incident light is measured by a photon detector b. the measurement of light is made at right angles to the incident light c. scattered light is directly proportional to the number of particles in solution d. measures the amount of incident light blocked by particles b What is the effect on the colligative properties when you increase the number of particles in the solution? Select one: a. Increases the boiling point, increases the freezing point b. Increases the boiling point, increases the vapor pressure c. Decreases the boiling point, increases the freezing point, d. Decreases the freezing point, decreases the vapor pressure d - increase boiling point - decrease freezing point - decrease vapor pressure - increase osmotic pressure What is the definition of retention factor (Rf) in thin layer chromatography? Select one: a. Ratio of distance moved by the unknown solute to distance moved by the solvent in the mobile phase b. Rate of movement of the mobile phase through adsorbant compared with standards and controls c. Measurement in centimeters of the distance the solute moved in the mobile phase from the point of application d. Distance moved by the mobile phase front from the point of application compared with a control a What is quenching? Select one: a. a type of resonant fluorescence b. an analytical procedure for determining fluorescent compounds. c. the loss of fluorescent intensity which produces falsely decreased patient results. d. the loss of fluorescent intensity which produces falsely increased patient results. c What will cause false values when using nephelometric analysis? Select one: a. absorption by a closely related atomic species b. excess analyte in the antigen/antibody reaction c. hemolyzed sample d. too much fluorophore in the analyte/fluorescing compound mixture b What measurement describes a current flow between two non-polarized electrodes with a known electrical potential? Select one: a. amperometry b. conductometry c. coulometry d. potentiometry b What does aldosterone secretion lead to? Select one: a. hypotension b. increased ECF (extracellular fluid) volume c. increased serum potassium