What kind of reaction adds water to break large biomolecules into subunits

Hydrolysis reaction

Explanation:

Hydrolysis reaction -

It is the type of reaction, where water is used to bifurcate the bond of some specific compound, is referred to as the hydrolysis reaction.

The reaction of hydrolysis is exactly opposite of the condensation reaction, in which two or molecules combine to form one unit.

Hence, even in case of biomolecules, water is used to break down the molecule into smaller unit, hence, it is type of hydrolysis reaction.