BT505 midterm past papers | BT505 Midterm solved past papers | BT505 Midterm solved mcqs

BT505 midterm past papers | BT505 Midterm solved past papers | BT505 Midterm solved mcqs

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BT505 - Biosensors

• Subject: BT505
• Type: PDF
• Content: BT505 midterm past papers
• Uploaded by: Indusstream.blogspot.com

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• BT406 Midterm solved MCQs
• BT406 midterm subjective past papers
• BT401 Mid-term subjective past papers
• BT406 Midterm Short notes

BT505 Current Midterm Past Papers:

1: Electrochemical properties of DNA bases. (2marks)
2: What is limit detection? Give example. (2marks)
Answer: The limit of detection is the lowest signal, or the lowest corresponding quantity to be determined from the signal, that can be observed with a sufficient degree of confidence or statistical significance

3: Principle of optical biosensor. (3marks)
Answer: The basic objective of an optical biosensor is to produce a signal which is proportionate to the concentration of a measured substance (analyte).
4: Hexokinase based florescent biosensor. (3marks)
Answer: Fluorescence monitoring of sol-gel entrapped yeast hexokinase is a suitable system for development as an in vivo glucose biosensor.
5: Advantages of enzymes based biosensors. (5marks)
Answer: Distinct advantages that enzyme-based biosensors provide, such as high sensitivity and specificity, portability, cost-effectiveness, and the possibilities for miniaturization and point-of-care diagnostic testing make them more and more attractive for research focused on clinical analysis, food safety control, or disease monitoring purposes.
6: What are two types of photoreceptors. (5marks)
Answer: Two basic types of photoreceptor, rods and cones, exist in the vertebrate retina (Fig. 13). The rods are photoreceptors that contain the visual pigment - rhodopsin and are sensitive to blue-green light with a peak sensitivity around 500 nm wavelength.
7: What is ion sensitive electrode? 2 max
Answer: Ion sensitive is a transducer that converts the activity of a specific ion dissolved in a solution into an electrical potential.
8: Note on optical biosensors of blood glucose 5max.
9: Characteristics and features of successful biosensors 5max.
10: Optical biosensors 2max.
11: How to construct thermal biosensors 3max.
12: Surface micromachining 3 Marks