WBCS.LIVE practice question

How do biological enzymes successfully speed up complex biochemical reactions within the human body?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. By heavily increasing the temperature of the reaction.
  2. By completely altering the end products of the reaction.
  3. By forcefully increasing the kinetic energy of the substrate.
  4. By lowering the activation energy of the reaction.

Correct answer and explanation

Correct answer: By lowering the activation energy of the reaction.

Explanation: ✅ Correct Answer: D) By lowering the activation energy of the reaction. 📚 Explanation: Enzymes are highly specialized protein catalysts that massively accelerate the rate of cellular chemical reactions. They achieve this strictly by binding to the reactant molecules (substrates) and positioning them optimally to react. This physically lowers the activation energy—the initial energy hurdle required to start the reaction—allowing it to proceed much faster.