Question

The enzyme increase rate of reaction by

• A. Increasing activation energy
• B. Decreasing activation energy
• C. Without affecting the activation energy
  
• D. None of the above
  

Answer 1

Answer: (B)

Decreasing activation energy

• Enzymes are biological catalysts which speed up the metabolic reaction by decreasing the activation energy.
• The energy required to start a chemical reaction is called activation energy.
• Enzymes bind to the reactant molecules which are called the substrate specifically, at a site on the enzyme molecule called the active site and forms enzyme-substrate complex thus, less energy is required.
  
• Lower the activation energy for a reaction faster the rate of reaction.
• So, the correct answer is 'Decreasing activation energy'.