18 Questions
What is the primary mechanism by which electrochemical biosensors detect changes in the analyte?
Changes in the electrical resistance or potential
Which type of biosensor is based on the piezoelectric effect, where certain materials generate an electric current when mechanically deformed?
Acoustic biosensors
What is the principle behind the detection of changes in the analyte by optic biosensors?
Changes in the properties of electromagnetic radiation
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
What is the primary function of a biological recognition element in a biosensor?
To recognize a specific biological element
Which type of electrochemical biosensor measures changes in the electrical current due to the interaction between the analyte and the bioreceptor?
Amperometry
What is the main difference between static and dynamic mode in mechanical biosensors?
Changes in position versus changes in movement
What is the main advantage of chemical sensors over biosensors?
They are more affordable to produce
What is the primary difference between biosensors and chemical sensors?
The presence of a biological component in the signal transduction
What is the function of the transduction element in a biosensor?
To transduce the signal into an analytical useful signal
What is the primary advantage of using chemical sensors in certain environments?
The biocomponents lose their activity in certain environments
What is the key characteristic of a biosensor that distinguishes it from other sensors?
It uses a biological recognition element
What is the primary function of a transducer in a biosensor?
To convert the bio-recognition event into a measurable signal
Which type of biosensor measures electrochemical changes produced due to the interaction between the analyte and the bioreceptor?
Electrochemical biosensors
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
What is the type of signal produced by most transducers in a biosensor?
Either optical or electrical signal
What is the purpose of an optical biosensor?
To measure changes in reflectance or fluorescence
What is the requirement for the proper functioning of a biosensor?
Work in adequate physical-chemical conditions
This quiz covers the principles and types of biosensors, including changes in electrode surfaces and biocatalytic bioreceptors, as well as optic biosensors that measure variations in electromagnetic radiation.
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