(i) Restriction enzymes and DNA These enzymes cut the helix of DNA on a specific site. So, these are also known as molecular scissors. DNA is a genetic material which is responsible to transfer genetic characters from one generation to the other.
(ii) Chitinase It is–an enzyme used to break the cell wall of fungi to release its cellular parts. Certain plants and fungus consists of a cell wall composed of chitin, which provides strength to the cell. Chitinase is used when there is a need to break this wall and allow entry of foreign DNA in plant cells.