Amperometric Biosensors Principle and Ferrocyanide Role Quiz
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Questions and Answers

What is the principle of an amperometric biosensor?

  • Measures the electric current resulting from the movement of electrons generated from the redox reaction between the electrodes (correct)
  • Measures the potential resulting from the movement of electrons generated from the redox reaction between the electrodes
  • Measures the voltage resulting from the movement of electrons generated from the redox reaction between the electrodes
  • Measures the resistance resulting from the movement of electrons generated from the redox reaction between the electrodes

    • What is the role of ferrocyanide in amperometric biosensors?

  • Catalyzes the oxidation of glucose to gluconolactone + H2O2
  • Generates a constant potential at the working electrode
  • Facilitates electron transfer between the redox-active mediator and the target analyte (correct)
  • Neutralizes the target analyte for accurate measurement

    • Which type of electrochemical sensor commonly uses ferrocyanide as a mediator?

  • Amperometric sensor (correct)
  • Potentiometric sensor
  • Voltammetric sensor
  • Conductometric sensor

    • What is the signal usually measured in a glucose biosensor?

    <p>Current (Ampere)</p> Signup and view all the answers

    What does glucose oxidase (GOx) catalyze in a glucose biosensor?

    <p>Oxidation of glucose to gluconolactone + H2O2 in the presence of O2</p> Signup and view all the answers

    What does the electric current measured in amperometric biosensors result from?

    <p>The movement of electrons generated from the redox reaction between the electrodes</p> Signup and view all the answers

    In an amperometric biosensor, the generated current is proportional to:

    <p>The analyte concentration</p> Signup and view all the answers

    What is the role of ferrocyanide in amperometric biosensors?

    <p>To facilitate electron transfer between the redox-active mediator and the target analyte</p> Signup and view all the answers

    What does glucose oxidase (GOx) catalyze in a glucose biosensor?

    <p>The oxidation of glucose to gluconolactone + H2O2 in the presence of O2</p> Signup and view all the answers

    What signal is usually measured in a glucose biosensor?

    <p>A current (Ampere) against concentration of glucose caused by a redox reaction of a mediator or H2O2 at the working electrode</p> Signup and view all the answers

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