Which organism is used to transfer T-DNA?

The organism which is used for gene transfer in higher organism is :

Which can be used as vector for transfer of DNA segment (a) bacterium, (b) plasmid (c) plasmodium , (d) bacteriophage

Which can be used as vector for transfer of DNA segment (a). bacterium (b). Plasmid (c) plasmodium (d) bacteriophage

Which of the following organisms was used to establish the semi-conservative nature of DNA?

Which of the following organisms was used to establish the semi-conservative nature of DNA?

Which acts as a vector to transfer a piece of DNA ?

Name the vector used for transferring ADA-DNA into the recipient cells in humans. Name the recipient cells.

Which of the following is not used to transfer the recombinant DNA into the host ?