1. Enzyme: Enzymes used in recombinant DNA technology are restriction, lysozyme, polymerase, ligase, alkaline phosphatase etc.
2. Vector: The vectors used in recombinant DNA technology are – plasmid, phagemid, virus, cosmid, transposon, artificial chromosome etc.
3. Host: The host used in recombinant DNA technology is E. coli, yeast, bacteria, plant cells, animal cells etc.