A foreign DNA and plasmid cut by the same restriction endonuclease can be joined to form a recombinant plasmid using?
| 1. | Eco Rl | 2. | taq polymerase |
| 3. | polymerase lll | 4. | ligase |
| 1. | Ori site | 2. | Palindromic sequence |
| 3. | Recognition site | 4. | Selectable marker |