All of the following are characteristics of enzymes except:
Correct answer: A. They increase the activation energy
- A. They increase the activation energy
- B. They are specific in action
- C. They possess specific active site
- D. They possess dimensional shapes
Explanation
They increase the activation energy: This statement is incorrect. Enzymes actually decrease the activation energy required for a chemical reaction to occur, making the reaction more favorable and speeding up the rate of the reaction. Therefore, the incorrect statement among the options is "They increase the activation energy." Enzymes actually lower the activation energy of reactions, allowing them to occur more readily.
This question appeared on the ETEA MDCAT 2009 paper, which you can sit online with every answer explained.
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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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