Observe the schematic representation of an enzyme-catalyzed reaction given below: Identify the class to which enzyme 'E' belongs according to the standard enzyme classification.

Step-by-step solution

The given schematic representation shows the joining of two molecules, A and B , to form a new compound A-B . This bond formation is coupled with the hydrolysis of ATP to ADP and inorganic phosphate ( P_i ), which provides the necessary energy for the reaction. According to the standard enzyme classification, enzymes that catalyze the linking together of two compounds, typically driven by the breakdown of a pyrophosphate bond in ATP or a similar compound, belong to the class Ligases . Therefore, the enzyme 'E' is a