Moderate

All of the following are related to enzymes except:

Correct answer: C. Increase the activation energy

  • A. Speed up reaction
  • B. Remain unchanged after reaction
  • C. Increase the activation energy
  • D. Possess the active site

Explanation

Option C is correct.Enzymes are biological catalysts that speed up chemical reactions by lowering the activation energy of the reaction. The activation energy is the amount of energy that must be added to the reactants in order to start the reaction. Enzymes do this by binding to the reactants and forming an enzyme-substrate complex. The enzyme-substrate complex lowers the activation energy of the reaction by stabilizing the transition state not increase activation energy , which is a high-energy intermediate state of the reaction. The other options are all related to enzymes: Speed up reaction: Enzymes speed up chemical reactions by lowering the activation energy of the reaction. Remain unchanged after reaction: Enzymes are catalysts, which means that they remain unchanged after the reaction is complete. Possess the active site: Enzymes have an active site, which is a region of the enzyme that binds to the reactants and catalyzes the reaction.

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About Enzymes

Enzymes are biological catalysts that lower activation energy without being consumed, and their specificity is explained by the lock and key and induced fit models. Work includes the effects of temperature, pH and substrate concentration on reaction rate, plus competitive and non-competitive inhibition and how these differ.

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