Which statement about enzymes as biological catalysts is correct?
Correct answer: D. They are regenerated unchanged at the end of the reaction
- A. They are consumed during the reaction
- B. They allow energetically impossible reactions to occur
- C. They increase the energy content of the products
- D. They are regenerated unchanged at the end of the reaction
Explanation
An enzyme leaves the reaction exactly as it entered, which is why tiny amounts can process huge quantities of substrate. It only speeds a reaction that could happen anyway by lowering the activation energy; it never changes the energy of substrates or products.
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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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