The figure given below shows the conversion of a substrate into product by an enzyme. In which one of the four options (a-d) the components of reaction labelled as A, B, C and D are identified correctly

Answer

B

Explanation

Activation energy requirement of noncatalyzed and enzyme-catalyzed reactions. Reactant A and B absorb energy from surroundings to climb the hill of activation
energy and reach the unstable transition state. The enzyme speeds up the reaction by reducing the uphill climb to the transition state. In this state, the reactant is in unstable condition and reaction to occur.