Enzymes are used in industry in an immobilised form, fixed to an inert support, mainly because
Correct answer: C. the enzyme can be recovered and reused and does not contaminate the product
- A. immobilised enzymes work at a much lower temperature
- B. immobilisation changes their specificity
- C. the enzyme can be recovered and reused and does not contaminate the product
- D. immobilised enzymes need no substrate
Explanation
Fixing the enzyme to beads or a membrane lets the product flow past and be collected pure, while the expensive enzyme stays behind for the next batch, and immobilised enzymes also tolerate heat and pH changes better. Lactose free milk is produced this way, by passing milk over immobilised lactase. The specificity of the enzyme is unchanged by immobilisation.
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About Characteristics of Enzymes
Enzymes are globular biological catalysts that lower activation energy without being consumed, usually showing specificity for particular substrates. Questions cover active sites, enzyme substrate complexes, the lock and key and induced fit models, intracellular and extracellular action, and the effects of denaturation, while distinguishing enzymes from non biological catalysts.
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