DNA isolation is a process where the whole intact DNA is separated from the cell body for further use. One of the important steps in the isolation process is to avoid breaking the DNA. Hence, DNA breaking or digesting enzymes are not used in the process deoxyribonuclease.

Ribonuclease is the group of enzymes that break down RNA having ribose sugar in its nucleotides. Proteases are the enzymes that break smaller peptides chains to dipeptides found to be active in the digestion process in our alimentary canal. Lysozymes are the lytic group of enzymes found in the organelle lysosome with the main function being the digestion or breaking down of foreign and waste particles.