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?

Current (Ampere) (B) Signup and view all the answers

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

Oxidation of glucose to gluconolactone + H2O2 in the presence of O2 (B) Signup and view all the answers

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

The movement of electrons generated from the redox reaction between the electrodes (D) Signup and view all the answers

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

The analyte concentration (C) Signup and view all the answers

What is the role of ferrocyanide in amperometric biosensors?

To facilitate electron transfer between the redox-active mediator and the target analyte (A) Signup and view all the answers

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

The oxidation of glucose to gluconolactone + H2O2 in the presence of O2 (C) Signup and view all the answers

What signal is usually measured in a glucose biosensor?

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