When a biochemical reaction is carried out in the laboratory, outside the human body in the absence of the enzyme, then the rate of reaction obtained is 10^–6 times, the activation energy of reaction in the presence of enzyme is:

Different from E_a obtained in the laboratory

In the given scenario, where a biochemical reaction is carried out in the absence of an enzyme, and the rate of reaction obtained is \(10^{-6}\) times the activation energy of the reaction in the presence of an enzyme, we can infer the following:

The activation energy (E_a) represents the energy barrier that must be overcome for a reaction to occur. In the presence of an enzyme, the enzyme facilitates the reaction by lowering the activation energy, thus increasing the reaction rate.

Considering that the rate of the reaction obtained in the absence of the enzyme is significantly lower than the rate in the presence of the enzyme (\(10^{-6}\) times lower), it implies that the activation energy of the reaction in the presence of the enzyme is much lower than the activation energy observed in the laboratory without the enzyme.

Therefore, the correct answer is:

(3) Different from Ea obtained in the laboratory