Enzymes work by which of the following?
Correct answer: B. Reducing the activation energy
- A. Increasing the activation energy
- B. Reducing the activation energy
- C. Making exergonic reactions endergonic
- D. Making endergonic reactions exergonic
Explanation
Enzymes work by reducing the activation energy required for a chemical reaction to occur. The activation energy is the minimum energy input needed for reactant molecules to transform into products during a chemical reaction. It represents the energy barrier that must be overcome for the reaction to proceed. Enzymes facilitate reactions by providing an alternative pathway with a lower activation energy. The active site of an enzyme interacts with the substrate (reactant), bringing the reactants into close proximity and allowing the reaction to occur more easily. This reduction in activation energy accelerates the rate of the reaction and makes it more favorable under physiological conditions.
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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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