Question

Which of the following statement about enzyme is correct ?

• A. They alter the equilibrium constant of reactions
• B. They increase the activation energy of reactions
• C. They are specific in their action
• D. They are consumed in the reaction

Hint:

Enzymes are specific biocatalysts: they speed up reactions without being consumed.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Enzymes are protein catalysts of biological reactions. A catalyst speeds up a reaction by giving it a path of lower activation energy.

Step 2: Check option A:
A catalyst does not change the equilibrium constant. So A is false.

Step 3: Check option B:
Enzymes lower, not raise, the activation energy. So B is false.

Step 4: Check option C:
Each enzyme acts on one substrate or one type of reaction, like a lock and key. So C is true.

Step 5: Check option D:
Enzymes are not consumed. They are regenerated at the end of the reaction. So D is false.

Final Answer:
Enzymes are specific in their action. \[ \boxed{\text{(C) }\text{They are specific in their action}} \]