DNAse is an enzyme that breaks down DNA molecules into smaller fragments. It plays a crucial role in various biological processes, including DNA repair and the removal of damaged DNA. By cleaving the phosphodiester bonds between nucleotides, DNAse helps maintain the integrity of the genetic material within cells. There are different types of DNAse, such as DNase I and DNase II, which vary in their specific functions and mechanisms. These enzymes are also used in laboratory settings for applications like molecular biology research, where they help in manipulating DNA for cloning, sequencing, and other genetic studies.