Questions and answers for exam Preparation

MCQs

Total Questions : 76 | Page 2 of 8 pages

Question 11. Which of the following technology is used for whole-blood monitoring in diabetes control?

Amperometric biosensor
Potentiometric biosensor
Optical biosensor
Calorimetric biosensor

Discuss Question

Answer: Option C. -> Optical biosensor
Answer: (c).Optical biosensor

Question 12. What does ‘X’ represent in the reaction?
Chromogen (2H) + H₂O₂ \(\underset{X}{\rightarrow}\) Dye + 2H₂O

Urease
Luciferase
Peroxidase
Penicillinase

Discuss Question

Answer: Option C. -> Peroxidase
Answer: (c).Peroxidase

Question 13. _______________ is used to detect the presence of bacteria in food or clinical samples.

Proteolytic enzymes
Luciferase
Rennet
Glucoamylase

Discuss Question

Answer: Option B. -> Luciferase
Answer: (b).Luciferase

Question 14. What does ‘Y’ represent in the following reaction?
ATP + Y + O₂ \(\underset{Luciferase}{\rightarrow}\) Oxyluciferin + AMP + pyrophosphate + CO₂ + light

Esters
Hydrogen peroxide
D – luciferin
Uric acid

Discuss Question

Answer: Option C. -> D – luciferin
Answer: (c).D – luciferin

Question 15. Luciferase is obtained from ________

firefly
yeast
bacillus acidopullulyticus
malted barley

Discuss Question

Answer: Option A. -> firefly
Answer: (a).firefly

Question 16. Which of the following statements is not true for biosensors?

Biosensors convert a biological signal into an electrical signal
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
Biosensors utilize the different biological systems such as enzymes, whole cell metabolism, ligand binding and the antibody-antigen reaction
Biosensor consists of a vessel, or series of vessels, used to perform a desired conversion by enzymic means

Discuss Question

Answer: Option D. -> Biosensor consists of a vessel, or series of vessels, used to perform a desired conversion by enzymic means
Answer: (d).Biosensor consists of a vessel, or series of vessels, used to perform a desired conversion by enzymic means

Question 17. If the physical change accompanying the reaction is heat output, the biosensors are referred to as _________________

potentiometric biosensors
optical biosensors
calorimetric biosensors
amperometric biosensors

Discuss Question

Answer: Option C. -> calorimetric biosensors
Answer: (c).calorimetric biosensors

Question 18. Which of the following features is not possessed by biosensor?

The biocatalyst used in the biosensor must be highly specific for the purpose of the analyses
The reaction occurring in the biosensor should be as independent of such physical parameters
Active site is mainly constituted by non-polar amino acids for catalysis to take place
The response from the biosensors should be accurate, precise, reproducible and linear

Discuss Question

Answer: Option C. -> Active site is mainly constituted by non-polar amino acids for catalysis to take place
Answer: (c).Active site is mainly constituted by non-polar amino acids for catalysis to take place

Question 19. Immobilized enzymes are more preferred over free enzymes in producing biosensors.

True
False
May be True or False
Can't say

Discuss Question

Answer: Option A. -> True
Answer: (a).True

Question 20. Which of the following property is not possessed by biosensors?

The probe used in the biosensor must be tiny and biocompatible, having no toxic or antigenic effects
The biosensor should be cheap, small, portable and capable of being used by semi-skilled operators
There should be a market for the biosensor
The specificity of substrate binding is mediated by spatial arrangement of atoms in an enzyme’s substrate binding site as well as substrate.

Discuss Question

Answer: Option D. -> The specificity of substrate binding is mediated by spatial arrangement of atoms in an enzyme’s substrate binding site as well as substrate.
Answer: (d).The specificity of substrate binding is mediated by spatial arrangement of atoms in an enzyme’s substrate binding site as well as substrate.