Discuss 'Enzymes lower the activation energy'.

Assertion : Enzymes lower the activation energy of the reactant molecule to make its transition into product easier. Reason : Enzymes are highly substrate specific

Activation energy is:

[A] : The energy derived from enzyme-sub-strate interaction , is called energy of formation . [R] : Free energy is the major source of energy used by enzymes to lower the activation energies of reactions .

Assertion : Specific substrate binds at the active site of the enzyme . Reason : Enzymes increase the activation energy of substrate .

Assertion (A): Poistive catalyst lowers the activation energy of the reaction whereas the heat of reaction remains same. Reason (R ): The heat of reaction is equal to the difference between activation energies for forward and backward reactions.

Enzymes are active

Assertion : The rate of a reaction sometimes does not depend on concentration. Resaon : Lower the activation energy, faster is the reaction

A catalyst lowered the activation energy byh 25KJmol^(-1) at 25^(@)C . By how many times will the rate grow?

In the presence of an enzyme, the activation energy of a reaction

How many of the following statements are correct regarding properties of enzyme ? (i) It lowers down the activation energy of the reaction . (ii) An active site of the enzyme is the pocket into which the substate fits . (iii) The catalytic structure of most of the enzyme is globular and primary . (iv) Carbonic anhydrase enzyme is considered as the fastest enzyme.