Which treatment permanently destroys the activity of an enzyme?
Correct answer: A. Strong heating well above its optimum
- A. Strong heating well above its optimum
- B. Cooling the solution to 0 degrees Celsius
- C. Diluting the enzyme solution
- D. Adding more substrate
Explanation
Strong heat breaks the weak bonds holding the tertiary structure, so the active site is permanently distorted. Cold only slows the molecules down and activity returns on warming, which is why refrigeration preserves without sterilising.
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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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