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Distribution of charges: Potentiometric biosensor:: Mass of reactants or products: _________

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Distribution of charges: Potentiometric biosensor:: Mass of reactants or products: _________

(a) Optical biosensor

(b) Calorimetric biosensor

(c) Piezo-electric biosensor

(d) Amperometric biosensor

I had been asked this question in an interview.

This interesting question is from Biosensors topic in portion Biosensors of Enzyme Technology

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Correct choice is (c) Piezo-electric biosensor

Easy explanation: In a biosensor, when the changes in the distribution of charges causes an electrical potential to be produced. Such biosensors are referred to as potentiometric biosensor. In the same way, if the effects are due to the mass of the reactants or products, then the biosensor is referred to as piezo-electric biosensor.

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