In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.

Assertion : Enzymes have active sites that hold substrate molecule for a chemical reaction.

Reason : Drugs compete with natural substrate by attaching covanetly to the active site of enzyme.

Assertion is correct statement but reason is wrong statement.

Drugs compete with natural substrate by attaching by weak bonds ( such as ionic bonding, H-bonding, van der Waals interaction, etc.) to the active site of the enzyme.