Biosensors MCQs : This section focuses on the "Biosensors". These Multiple Choice Questions (MCQs) should be practiced to improve the Biosensors skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
_______________ converts biochemical events into measurable signals.
A. amplifier
B. opamp
C. rectifier
D. transducer
Question 2
An example of biosensor, urea electrode makes use of which of the following electrodes?
A. Carbon dioxide electrode
B. Ammonia electrode
C. Fluoride electrode
D. Ammonium electrode
Question 3
Biosensors measure glucose concentrations between which of the following ranges?
A. 10-1 to 10-2 M
B. 10-2 to 10-4 M
C. 10-1 to 10-4 M
D. 10-1 to 10-7 M
Question 4
Blood glucose level measurement device uses a biosensor works on the principle of electrochemical.
A. True
B. False
Question 5
Doppler velocimetry works on the principle of __________
A. frequency measurement of fiber optic sensor
B. amplitude measurement of fiber optic sensor
C. phase measurement of fiber optic sensor
D. time shift measurement of fiber optic sensor
Question 6
Fluoroptic temperature sensors work on the principle of _______
A. thermistor
B. thermocouple
C. optical fiber
D. rtd
Question 7
For constructing the glucose sensor, which of the following is used as a gel?
A. Urea
B. Urease
C. Acrylamide
D. Polyacrylamide
Question 8
Home blood glucose measurement devices measure the glucose level through non-invasive method.
A. True
B. False
Question 9
Home blood glucose sensor works on which principle?
A. electro-physiological
B. electrochemical
C. physio-chemical
D. chemical
Question 10
In glucose electrode, glucose oxidase has been coupled to an electrode by which of the following materials?
A. Ferrocene derivatives
B. Urease
C. Polyacrylamide
D. Biochips
Question 11
In glucose sensor, a measure of change in oxygen value is a measure of the glucose value.
A. True
B. False
Question 12
Monopolar needle electrode have a coating of which material over the stainless steel wires which are bare only at the tips?
A. carbon
B. calcium
C. sodium
D. teflon
Question 13
Nanoscopic optical biosensors have fast response time but the sensitivity is reduced.
A. True
B. False
Question 14
The biological response of the biosensor is determined by ______
A. biocatalytic membrane
B. physio-chemical membrane
C. chemical membrane
D. artificial membrane
Question 15
The chemical reaction of glucose with oxygen is catalyzed in the presence of ________
A. glucose oxidase
B. monoglucose carbodase
C. glusoce dioxidase
D. biglucose oxidase
Question 16
Transducers employed in the bulk of enzyme electrodes use which of the following principles?
A. Amperometric
B. Optical
C. Magnetic
D. Colorimetric
Question 17
Which of the following biosensors use the movement of electrons produced during redox reactions?
A. Amperometric biosensor
B. Potentiometric biosensors
C. Piezo-electric biosensors
D. Optical biosensors
Question 18
Which of the following is not a characteristic of the immobilized enzymes?
A. They cannot be re-used
B. It produces reproducible results
C. Stability exists
D. Same catalytic activity is present for number of analysis
Question 19
Which of the following is the physico-chemical component?
A. Enzymes
B. Anti-bodies
C. Transducer
D. Cells or tissues
Question 20
Which of these biosensors use the principle of heat released or absorbed by a reaction?
A. Potentiometric biosensor
B. Optical biosensors
C. Piezo-electric biosensors
D. Calorimetric biosensors
Question 21
_______________ biosensors are those in which the changes in the distribution of charges causing an electrical potential to be produced.
A. Calorimetric
B. Potentiometric
C. Optical
D. Amperometric
Question 22
Distribution of charges: Potentiometric biosensor:: Mass of reactants or products: _________
A. Optical biosensor
B. Calorimetric biosensor
C. Piezo-electric biosensor
D. Amperometric biosensor
Question 23
Heat output: calorimetric biosensor:: light output: ____________
A. Optical biosensor
B. Piezo-electric biosensor
C. Potentiometric biosensor
D. Amperometric biosensor
Question 24
Immobilized enzymes are more preferred over free enzymes in producing biosensors.
A. True
B. False
Question 25
In a biosensor ___________ is one which involves subtracting a ‘reference’ baseline signal from the sample signal.
A. signal processor
B. amplifier
C. detector
D. transducer
Question 26
There are 3 so called generation of biosensors.
A. True
B. False
Question 27
What property of enzyme doesn’t make it an excellent analytical reagent?
A. Specificity
B. Selectivity
C. Piezo-electric biosensor
D. Location of the enzyme
Question 28
When the physical change produced in a biosensor is due to the movement of electrons produced in a redox reaction, the biosensor is referred to as ____________
A. calorimetric biosensor
B. potentiometric biosensor
C. piezo-electric biosensor
D. amperometric biosensor
Question 29
Which of the following features is not possessed by biosensor?
A. The biocatalyst used in the biosensor must be highly specific for the purpose of the analyses
B. The reaction occurring in the biosensor should be as independent of such physical parameters
C. Active site is mainly constituted by non-polar amino acids for catalysis to take place
D. The response from the biosensors should be accurate, precise, reproducible and linear
Question 30
Which of the following property is not possessed by biosensors?
A. The probe used in the biosensor must be tiny and biocompatible, having no toxic or antigenic effects
B. The biosensor should be cheap, small, portable and capable of being used by semi-skilled operators
C. There should be a market for the biosensor
D. The specificity of substrate binding is mediated by spatial arrangement of atoms in an enzyme’s substrate binding site as well as substrate.
Question 31
Which of the following statements is not true for biosensors?
A. Biosensors convert a biological signal into an electrical signal
B. Biosensors are used to determine the concentration of substances and other parameters of biological interest even where they do not utilize a biological system directly
C. Biosensors utilize the different biological systems such as enzymes, whole cell metabolism, ligand binding and the antibody-antigen reaction
D. Biosensor consists of a vessel, or series of vessels, used to perform a desired conversion by enzymic means