What kind of reaction adds water to break large bio molecules into subunits

The correct answer is hydrolysis.

Hydrolysis refers to a term used for both a biological one and an electrochemical procedure. The biological hydrolysis refers to the breaking of biomolecules where a molecule of water is utilized to influence the differentiation of a larger molecule into its constituent parts.

Hydrolysis can be the opposite of a condensation reaction in which two molecules are combined together into a bigger one and remove a molecule of water. Thus, hydrolysis supplements water to dissociate, on the other hand, condensation builds up by withdrawing water and any other solvents.

not sure if this is what you'r looking for eubacteria and archaebacteria