Question

Potentiometric biosensors uses _______________ in order to transduce the biological reaction into an electrical signal.

(a) ion-selective electrodes

(b) clark oxygen electrode

(c) thermistors

(d) colorimetric test strips

This question was addressed to me in an interview.

This is a very interesting question from Potentiometric Biosensors topic in section Biosensors of Enzyme Technology

Answer 1

Correct answer is (a) ion-selective electrodes

The best explanation: In potentiometric biosensors, ion-selective electrodes transduce biological reaction into an electrical signal. Clark oxygen electrode are used in amperometric biosensors, whereas colorimetric test strips are used in optical biosensors. Thermistors are used to measure the temperature difference in calorimetric biosensors.