The diagram represents a reaction with and without an enzyme. What is the activation energy of the enzyme catalysed reaction?
(a) A
(b) B
(c) C
(d) D
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Correct option is (b) B
The reaction that is enzyme-catalysed has lower activation energy and is represented by the dotted line. The energy input required to raise the energy of the reactants to a certain level before the reaction is triggered is called the activation energy. This is represented by the increase in energy of the reactants to the top of the ‘hill’, B.