An enzyme changes the rate of a reaction without altering its
Correct answer: C. overall energy difference between substrates and products
- A. activation energy
- B. speed of completion
- C. overall energy difference between substrates and products
- D. reaction pathway
Explanation
Catalysts lower the activation energy and speed the reaction, but the energy of substrates and products is fixed by chemistry, so the enzyme cannot change it. This is why an enzyme never makes an unfavourable reaction favourable.
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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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