Cloning and Biotechnology (OCR A-Level Biology A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What economic limitation led to the development of enzyme immobilisation technology?
What economic limitation led to the development of enzyme immobilisation technology?
High cost of recovering soluble enzymes
What defines an immobilised enzyme?
What defines an immobilised enzyme?
Fixed to inert substance or in a bead
In the calcium alginate method, what happens when the enzyme-alginate mixture contacts calcium ions?
In the calcium alginate method, what happens when the enzyme-alginate mixture contacts calcium ions?
Viscous beads form immediately
Which immobilised enzyme converts glucose to fructose in high-fructose corn syrup production?
Which immobilised enzyme converts glucose to fructose in high-fructose corn syrup production?
Glucose isomerase
What is a key advantage of using immobilised enzymes over soluble enzymes in industry?
What is a key advantage of using immobilised enzymes over soluble enzymes in industry?
No contamination of final product
Why is glucose isomerase expensive to extract from microorganisms?
Why is glucose isomerase expensive to extract from microorganisms?
It is an intracellular enzyme
Which test gives a negative result to confirm no enzyme leakage from immobilised enzyme beads?
Which test gives a negative result to confirm no enzyme leakage from immobilised enzyme beads?
Biuret solution test for protein
Why do immobilised enzymes work more slowly than soluble enzymes?
Why do immobilised enzymes work more slowly than soluble enzymes?
Substrates must diffuse through gel matrix
At 50°C, immobilised lactase maintains approximately what percentage of its maximum activity?
At 50°C, immobilised lactase maintains approximately what percentage of its maximum activity?
70%
Why are immobilised enzymes more resistant to denaturation at high temperatures?
Why are immobilised enzymes more resistant to denaturation at high temperatures?
Gel matrix provides structural support