499203
Description
Quiz by daniel.praecox, updated more than 1 year ago
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Question 1
Question
Why are enzymes immobilised during bioprocessing?
Answer
-
They are insoluble and easier to reuse and recover
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To prevent wasting the enzymes
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To decrease the yield of products
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They are soluble and harder to reuse
Question 2
Question
How are enzymes immobilised?
Answer
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bonded to each other
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bonded or attached to an insoluble support
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fixed to a substrate
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enclosed in a gel or membrane
Question 3
Question
Trapping the enzymes/cells in a gel is the most common technique used for immobilising enzymes
Answer
- True
- False
Question 4
Question
In the production of alcohol, what gel are the enzymes/cells fixed to?
Answer
-
Sodium Chloride
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Sodium Alginate
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Potassium Alginate
Question 5
Question
What solution are the beads of the sodium alginate-cell/enzyme mixture soaked in during alcohol fermentation?
Answer
-
Calcium Chloride
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Sodium Chloride
-
Potassium Chloride
Question 6
Question
What role does calcium chloride play in alcohol fermentation?
Answer
-
It allows sucrose to enter the alginate pores.
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It causes the alginate to enclose the immobilised yeast cells.
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It prevents the yeast to pass through the pores.
Question 7
Question
Choose the advantages of immobilised cells used in bioprocessing?
Answer
-
It does not damage the cells or affect their ability to carry out the reaction.
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It is a costly process.
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The immobilised cells can easily be recovered from the culture medium at the end of the process.
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Immobilised cells substantially increase the need for filtration.
Question 8
Question
Immobilised cells are being increasingly used over immobilised enzymes.
Answer
- True
- False
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