A gene whose expression helps to identify transformed cell is known as:
1. Vector
2. Plasmid
3. Structural gene
4. Selectable marker
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 |