Biosensors and Bioreceptors

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What is the primary mechanism by which electrochemical biosensors detect changes in the analyte?

Changes in the mechanical properties of the biosensor
Changes in the electrical resistance or potential (correct)
Changes in the electromagnetic radiation properties
Changes in the mass of the biosensor surface

Which type of biosensor is based on the piezoelectric effect, where certain materials generate an electric current when mechanically deformed?

Acoustic biosensors (correct)
Optic biosensors
Mechanical biosensors
Electrochemical biosensors

What is the principle behind the detection of changes in the analyte by optic biosensors?

Changes in the properties of electromagnetic radiation (correct)
Changes in the mass of the biosensor surface
Changes in the electrical resistance of the biosensor
Changes in the mechanical properties of the biosensor

What type of biosensor is based on mobile or flexible structures that suffer a deflection in one of its edges due to the incorporation of the analyte?

Mechanical biosensors (D) Signup and view all the answers

What is the primary function of a biological recognition element in a biosensor?

To recognize a specific biological element (D) Signup and view all the answers

Which type of electrochemical biosensor measures changes in the electrical current due to the interaction between the analyte and the bioreceptor?

Amperometry (B) Signup and view all the answers

What is the main difference between static and dynamic mode in mechanical biosensors?

Changes in position versus changes in movement (A) Signup and view all the answers

What is the main advantage of chemical sensors over biosensors?

They are more affordable to produce (C) Signup and view all the answers

What is the primary difference between biosensors and chemical sensors?

The presence of a biological component in the signal transduction (B) Signup and view all the answers

What is the function of the transduction element in a biosensor?

To transduce the signal into an analytical useful signal (D) Signup and view all the answers

What is the primary advantage of using chemical sensors in certain environments?

The biocomponents lose their activity in certain environments (D) Signup and view all the answers

What is the key characteristic of a biosensor that distinguishes it from other sensors?

It uses a biological recognition element (B) Signup and view all the answers

What is the primary function of a transducer in a biosensor?

To convert the bio-recognition event into a measurable signal (B) Signup and view all the answers

Which type of biosensor measures electrochemical changes produced due to the interaction between the analyte and the bioreceptor?

Electrochemical biosensors (B) Signup and view all the answers

What is the characteristic of electrochemical biosensors that allows them to measure changes in the analyte/product/subproduct concentration?

Variation in the analyte/product/subproduct concentration (C) Signup and view all the answers

What is the type of signal produced by most transducers in a biosensor?

Either optical or electrical signal (C) Signup and view all the answers

What is the purpose of an optical biosensor?

To measure changes in reflectance or fluorescence (A) Signup and view all the answers

What is the requirement for the proper functioning of a biosensor?

Work in adequate physical-chemical conditions (C) Signup and view all the answers