When a biochemical reaction is carried out in a laboratory outside the human body in the absence of an enzyme,

Question

When a biochemical reaction is carried out in a laboratory outside the human body in the absence of an enzyme, then the rate of reaction obtained is $10^{-6}$ times. The activation energy of a reaction in the presence of an enzyme is:

Accepted Answer

Enzymes act as biological catalysts that increase the rate of a reaction by providing an alternate reaction pathway with a lower activation energy . Therefore, the activation energy of the reaction in the presence of an enzyme is different (specifically, lower) than the activation energy ($E_a$) obtained for the uncatalysed reaction carried out in the laboratory .

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