Nanomedicine 1 – Bioanalysis 2025/2026
Exam Questions and Answers | 100%
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What is the general principle of an affinity protein sensor? - 🧠 ANSWER ✔✔The
general principle of an affinity protein sensor involves the use of a specific protein
or peptide that can recognize and bind to a target protein of interest. This binding
interaction between the affinity protein and the target protein leads to a measurable
signal that can be used to detect and quantify the presence of the target protein.
The affinity protein acts as a recognition element in the sensor, allowing for
selective detection and analysis of the target protein in complex biological
samples. In the case of affinity (non-catalytic) biosensor, the analyte is bound to
the receptor irreversibly, and during the interaction no new biochemical reaction
product is formed. This type of sensor comprises antibodies, cell receptors, and
nucleic acids as the target for detection.
,Briefly mention possible transduction methods for protein biosensors. - 🧠
ANSWER ✔✔There are several possible transduction methods for protein
biosensors. Some of the commonly used methods include:
Optical methods: These involve the use of optical signals such as fluorescence,
absorbance, or surface plasmon resonance (SPR) to detect and quantify the binding
events between the affinity protein and the target protein.
Electrochemical methods: These methods rely on the measurement of changes in
electrical properties, such as current or potential, resulting from the binding
interaction between the affinity protein and the target protein.
Mechanical (Mass-based methods): These methods utilize the change in mass or
resonance frequency caused by the binding event, which can be detected using
techniques such as quartz crystal microbalance (QCM) or surface acoustic wave
(SAW) sensors.
What are the major difficulties in protein biosensor technology? - 🧠 ANSWER
✔✔1. Selectivity and specificity
2. Stability and reproducibility
3. Sensitivity
4. Regeneration and reusability
, 3
5. Sample matrix interference
6. Integration and miniaturization
7. Validation and standardization
What are the basic/general elements (or components) of all point-of-care/Lab-on-a-
chip biosensors? Include a list of five sensing principles. - 🧠 ANSWER ✔✔an
analyte, bioreceptor, transducer, electronics, and display.
1. Analyte: A substance of interest whose constituents are being identified or
detected (e.g., glucose, ammonia, alcohol, and lactose).
2. Bioreceptor: A biomolecule (molecule) or a biological element that can
recognize the target substrate (i.e., an analyte) is known as bioreceptor (e.g.,
enzymes, cells, aptamers, deoxyribonucleic acid (DNA or RNA), and antibodies).
The process of signal production (in the form of light, heat, pH, charge or mass
change, plant or animal tissue, and microbial products) during the interaction
between bioreceptor and analyte is called biorecognition.
3. Transducer: A device that transforms energy from one form to another. The
transducer is a key element in a biosensor. It converts the biorecognition event into
a measurable signal (electrical) that connects with the quantity or in the presence of
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
Exam Questions and Answers | 100%
Pass
What is the general principle of an affinity protein sensor? - 🧠 ANSWER ✔✔The
general principle of an affinity protein sensor involves the use of a specific protein
or peptide that can recognize and bind to a target protein of interest. This binding
interaction between the affinity protein and the target protein leads to a measurable
signal that can be used to detect and quantify the presence of the target protein.
The affinity protein acts as a recognition element in the sensor, allowing for
selective detection and analysis of the target protein in complex biological
samples. In the case of affinity (non-catalytic) biosensor, the analyte is bound to
the receptor irreversibly, and during the interaction no new biochemical reaction
product is formed. This type of sensor comprises antibodies, cell receptors, and
nucleic acids as the target for detection.
,Briefly mention possible transduction methods for protein biosensors. - 🧠
ANSWER ✔✔There are several possible transduction methods for protein
biosensors. Some of the commonly used methods include:
Optical methods: These involve the use of optical signals such as fluorescence,
absorbance, or surface plasmon resonance (SPR) to detect and quantify the binding
events between the affinity protein and the target protein.
Electrochemical methods: These methods rely on the measurement of changes in
electrical properties, such as current or potential, resulting from the binding
interaction between the affinity protein and the target protein.
Mechanical (Mass-based methods): These methods utilize the change in mass or
resonance frequency caused by the binding event, which can be detected using
techniques such as quartz crystal microbalance (QCM) or surface acoustic wave
(SAW) sensors.
What are the major difficulties in protein biosensor technology? - 🧠 ANSWER
✔✔1. Selectivity and specificity
2. Stability and reproducibility
3. Sensitivity
4. Regeneration and reusability
, 3
5. Sample matrix interference
6. Integration and miniaturization
7. Validation and standardization
What are the basic/general elements (or components) of all point-of-care/Lab-on-a-
chip biosensors? Include a list of five sensing principles. - 🧠 ANSWER ✔✔an
analyte, bioreceptor, transducer, electronics, and display.
1. Analyte: A substance of interest whose constituents are being identified or
detected (e.g., glucose, ammonia, alcohol, and lactose).
2. Bioreceptor: A biomolecule (molecule) or a biological element that can
recognize the target substrate (i.e., an analyte) is known as bioreceptor (e.g.,
enzymes, cells, aptamers, deoxyribonucleic acid (DNA or RNA), and antibodies).
The process of signal production (in the form of light, heat, pH, charge or mass
change, plant or animal tissue, and microbial products) during the interaction
between bioreceptor and analyte is called biorecognition.
3. Transducer: A device that transforms energy from one form to another. The
transducer is a key element in a biosensor. It converts the biorecognition event into
a measurable signal (electrical) that connects with the quantity or in the presence of
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
